[wireless] version 1.2. course outline introduction to wireless customer needs and the solution ...

[Wireless]Version 1.2

Course Outline Introduction to Wireless

Customer Needs and The Solution

Wireless Standards and Certifications

Wireless Access Point Operation Modes

Power Over Ethernet

Wireless Antenna

Wireless Security

D-Link Wireless Product

Wireless Solution

Wireless Application

D-Link Unified Access System

• Unified Access System Overview

• D-Link Unified Wireless Switch

• D-Link Wireless Switch Features and Advantages

• D-Link Unified Access Point

• Market Analysis for D-Link Wireless Switch

• Wireless Switch Deployment Application

• Success Stories

2

Introduction to WirelessDCS – Wireless

3

Introduction to Wireless


After this session, you should be capable of express:1. What is wireless LAN technology, its advantages and differences

between the wired LAN2. The evolution of wireless LAN3. Basic knowledge of wireless technology: What is the minimum

requirement to build a WLAN, types of wireless network and step-by-step needed in building WLAN

4

Wireless LAN Technology Overview Wireless LAN Definition

• Network infrastructure where all data are being transmitted and received use radio signals over the air instead of wires.

Advantages of implementing WLAN technology• Increase mobility• Low implementation and network expansion• Scalability

Differences between wired LAN and wireless LAN

Wired LAN Wireless LAN

• Run network cable installation• Limited by network media• Depend on physical location• Data are sent through network cable

• Not required to run network cable installation

• Not limited by network media• Independent on physical location• Data are sent through the air

WLAN Technology


5

Comparison between Wired LAN & Wireless LAN

Wired LAN Wireless LAN

Installation Moderate level of difficulty

Easier, but must be careful with the interference issue

Cost Less More

Reliability High Reasonably High

Performance Very Good Good

Security Reasonably Good Reasonably Good

Mobility Limited Outstanding

WLAN Technology


6

History of Wireless LAN Below are the evolution of Wireless LAN

• 1970 – ALOHAnet was developed at the University of Hawaii• 1985 – Federal Communication Commission (FCC) announced authorized

license-free wireless bands• 1991 – First workshop held by IEEE. WLAN product had been launched,

and IEEE had just started to develop wireless standard• 1997 – Federal Communication Commission (FCC) announced authorized

wireless equipment which used the license-free bands

History of WLAN


7

1970 1985 1991 1997

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Basic Component for Wireless Network

Basic Knowledge on Wireless Network


Basic component for wireless network• Wireless Client/STA – e.g. Wi-Fi Phone, PDA with Wi-Fi built-in, etc

– Wireless adapter for client device (used only for client that does not support wireless– Wireless USB Adapter– PCMCIA– Express Card and PICe

• Wireless device– Access Point– Wireless Router

• Antenna

8

D-Link Wireless USB Adapter

D-Link PCMCIA wireless network

adapter

D-Link Access Point

Outdoor Antenna

Wireless Network Types



Ad-Hoc type (1)• Connect to other wireless client devices

without the use of any wireless media• Useful for establishing a network where

wireless infrastructure does not exist or where services are not required

• Not suitable for large scale network Infrastructure type (2)

• Connect to other wireless client device with the use of any wireless media to act as a central point

• Suitable to be deployed for a large scale network

Hybrid type (3)• Combination between Ad-Hoc and

Infrastructure• Sometimes supported. Security

problem might appear if clients additionally formed Ad-Hoc network with no or simple authentication

9

Building Wireless LAN Steps in building WLAN

• Evaluate and assess customer requirements• Do site survey activity task• Plan and design the solution• Choose the right wireless equipment• Implement the solution• Enhance the network (security, etc)

Consideration in building WLAN• Same wireless channel cannot overlap• Same frequency used by other devices may interfere the performance of

wireless LAN



10

Summary Using wireless technology, all data are being transmitted and

received over the air use radio signal instead of wires. WLAN technology provides more advantages compared to LAN

technology, especially in flexibility and mobility. The idea of inventing wireless technology first came on 1970 when

ALOHAnet was developed at University of Hawaii and it was continuously improved until now.

To build a wireless network, the minimum devices required are Wireless compatible client (or wireless adapter needed for wireless incompatible client) and the wireless device such as access point.

Actually, there are two wireless network types: Ad-Hoc type for small network and infrastructure type for bigger network.

In building WLAN, there are things needed to be considered and it will be better if we follow the right steps.

Summary


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Questions and Answers1. Select options that are not advantages of using wireless technology. (Choose all

that apply)A. Increase mobilityB. High implementation costC. No standardization for wireless technologyD. High scalabilityE. Easy network expansion

2. Select characteristics belonging to wireless technology. (Choose all that apply)A. Data are sent through network mediaB. Depend on the physical locationC. Not required to run network cable installationD. Data are sent using radio signal

3. Select year when FCC first announced authorized license-free wireless bands.A. 1970B. 1985C. 1991D. 1997

Questions and Answers


12

Questions and Answers4. Select requirements that are needed when building a wireless

network. (Choose two)A. Access PointB. RouterC. SwitchD. Wireless AdapterE. Bridge

5. Select the statement that best describes Ad-Hoc wireless network type.A. The wireless coverage area is known as Basic Service Set or CellB. Require single device that control the communication in the networkC. All clients within the network are equalD. Suitable to be deployed for a large scale network



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Customer Needs and The Solutions

DCS – Wireless

14



After this section, you should be capable of expressing:1. Common customer needs when building network infrastructure2. Solutions that D-Link provide to fulfill all customer needs

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Common Customer Needs when Deploying Network Infrastructure Flexibility Scalability Ease of deployment Secure network infrastructure Simple network management

Common Customer Needs


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Flexibility

D-Link Solutions for Customer Needs


We can flexibly connect the WLAN with LAN

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Mobile clientMobile client

Shared network printer

File Server

Layer 2 switch

Document to be printed

Send document to the network

printer

AP receive the packetForwards the packet to switch

Switch receive the packet and forward it to

network printer

Receive the packet,Print the documents

Mobile client

Get documents

from file server

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Scalability



Network expansion is scalable by adding more wireless devices

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Existing Network area New Extended network area



File Server

Layer 2 switch

Mobile client

PDA User

Additional wireless device

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Ease of Deployment



Customers are not limited to physical area when deploy a wireless network infrastructure, for example: different location in the same building or connect building-to-building wireless infrastructure

Less effort in cable installation – Customers do not need to do so much cable installation

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File Server

Layer 2 switch

Mobile client

PDA

Minimal Cable installation in the WLAN

Secure Network Infrastructure



Permits only authorized users to connect to the network

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Authorized Client

Unauthorized client

Access to network Allowed

Join to network,

Accessing network resources

Access to network denied

✕


File Server

Layer 2 switch

Router

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Simple Network Management



Administrator or authorized user can simply managed the network infrastructure

Easy when do some monitoring task and control network traffics

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AP_1 AP_2

Manage any wireless devices and control

network traffics through client’s device

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Summary When building a network infrastructure, some requirements from

the customer that need to be fulfilled are quite common. Generally, the customer wants the network built were deployed easily, provides flexibility, scalability, secured, and easy to manage and monitor.

D-Link provides solutions for these customer needs. One of the solutions is implementing wireless technology. D-Link wireless products provide many advantages for customers and is widely known as a powerful device.

Summary


22

Questions and Answers1. Select common customer needs when deploying network

infrastructure. (Choose all that apply)A. Complicated network infrastructure to prevent users from attacking the

internal networkB. Customers are not limited to physical area when deploying a wireless

network infrastructureC. Easy when doing some monitoring task and control network trafficsD. High effort in cable installation



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DCS – Wireless

24

Wireless Standards and Certifications Wireless Standards Wireless Certifications


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Wireless Standards


After this section, you should be capable of expressing:1. All wireless standards (802.11a/b/g/n) start from characteristics,

differences between each standard2. Advantages for the newest wireless standard (802.11n)

Wireless Standards

26

IEEE Wireless Standard Overview 802.11a – 5GHz, ratified in 1999 (shipping 2001) 802.11b – 11Mbps, 2.4GHz, ratified in 1999 802.11c – MAC-layer bridging (802.1d) 802.11d – Additional regulatory domains (world mode) 802.11e – Quality of Service 802.11f – Inter-Access Point Protocol (IAPP) 802.11g – Higher Data Rate (>20Mbps, actually 54Mbps), 2.4GHz 802.11h – 54Mbps at 5GHz using DFS and TPC (Europe) 802.11i – Authentication and security 802.11j – Japan regulatory conformance 802.11k – Radio Resource Management (Signal Quality, 2004) 802.11m – Various 802.11 improvements (bugfixes) 802.11n – Beyond 100Mbps, longer distances (2007) 802.11p – Wireless Access for the Vehicular Environment (WAVE) 802.11r – Fast roaming 802.11s – Mesh networks 802.11T – Wireless Performance Prediction (WPP), test methods and metrics 802.11u – Interoperability with non-802 networks (e.g. cellular) 802.11v – WLAN Management

Wireless Standards Overview


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List of Ratified Wireless StandardsStandards 802.11a 802.11b 802.11g

Release Date October 1999 October 1999 June 2003

Frequency 5 GHz 2.4 GHz 2.4 GHz

Throughput (Typical)

23 Mbps 4.3 Mbps 19 Mbps

Max. Data Rate 54 Mbps 11 Mbps 54 Mbps

Modulation Technique

OFDM DSSS OFDM

Range (Indoor)* ~ 35 meters ~ 38 meters ~ 38 meters

Range (Outdoor)**

~ 120 meters ~ 140 meters ~ 140 meters

* Range depends on number of walls and the type.** Range depends on total loss (include any obstacles)

Ratified Wireless Standards


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Comparison of 802.11a/b/g Wireless Standards802.11a 802.11b 802.11g

Speed Fast speed Slow speed Fast speed

Compatibility with other 802.11 standards

Not compatible with 802.11b/g standards

Compatible with 802.11g standard

Compatible with 802.11b standard

Vulnerable to interference

No No No

Distance coverage Short distance Long distance Long distance

Signal strength due to penetrating obstacles

Poor Lower Lower

Suitable application Nearby building-to-building connection

(rarely implemented today)

Hotspot area, office, hospital, etc

Ratified Wireless Standards


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Characteristics of 802.11n on D-Link Products802.11n **

Release Date September 2009

Speed 300 Mbps

Frequency 2.4GHz and 5.0GHz

Range 250 meters

802.11n Wireless Standard


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** 802.11n is still in draft (version 2) and has been not ratified yet, so maximum range value may change

Advantages of 802.11n

802.11n Wireless Standard


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802.11n - Wide Wireless coverage area

802.11b/g

802.11a

Wireless client AWireless client B

Client A want to send message to client B

Start to send message to AP

Client B received the message

Faster data transfer

Message received by AP,AP forward the message to client B

Multiple Antenna (MIMO)Optimize data speed and greater coverage area

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Summary: Wireless Standard Currently, there are three wireless standards which already ratified

by IEEE. Those standards are 802.11a, 802.11b, and 80211g. 802.11a runs on the frequency of 5GHz while 802.11b and 802.11g

run on the frequency of 2.4GHz. 802.11a and 802.11g provide 54Mbps of speeds, while 802.11b

provides only 11Mbps of speed. The newest wireless standards which has not been ratified yet is

802.11n. It runs on both frequency (2.4GHz and 5.0GHz). D-Link products do support 802.11n standard for both frequencies. The speed for this standard can be up to 300Mbps and provides the farthest signal strength.

Summary: Wireless Standard


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Questions and Answers: Wireless Standards1. Select ratified wireless standards that run on 2.4GHz frequency. (Choose

all that apply)A. 802.11aB. 802.11bC. 802.11gD. 802.11n

2. Select ratified wireless standards that provide the fastest speed. (Choose all that apply)A. 802.11aB. 802.11bC. 802.11gD. 802.11n

3. Select standard that is least prone to interference.A. 802.11aB. 802.11bC. 802.11gD. 802.11n

Questions and Answers: Wireless Standards


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Questions and Answers: Wireless Standards4. Select advantages of 802.11n over other wireless standards.

(Choose two)A. High level of securityB. Support dual-band operation (2.4GHZ, and 5.0GHz)C. Least prone to interferenceD. The use of MIMO speeds up data transfer

Questions and Answers: Wireless Standards


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Wireless Certifications


After this section, you should be capable of expressing:1. What is Wi-Fi Alliance and its purpose2. Types of certifications defined by the Wi-Fi Alliance along with the

general information for each certification

Wireless Certifications

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Wi-Fi Alliance Overview Wi-Fi Alliance is a non-profit international association formed in 1999

to certify interoperability of wireless Local Area Network products based on IEEE 802.11 specification.• 210 member companies from around the world• 865 products have received Wi-Fi® certification• The goal of the Wi-Fi Alliance’s members is to enhance the use

experience through product interoperability

Wi-Fi Alliance


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Certification defined by Wi-Fi Alliance Wireless Fidelity (Wi-Fi) Certification

• Wi-Fi CERTIFIED logo is the only assurance that a product has met rigorous interoperability testing requirements to ensure that compatible products from different vendors will work together.

Wireless Multimedia (WMM) Certification• Technology that maintains the priority of audio, video and voice

applications in a Wi-Fi network so that other applications and traffic are less likely to slow them.

Wireless Security Certification (WPA/WPA2)• Wi-Fi Alliance has to ensure that all Wi-Fi Certified wireless products must

support WPA/WPA2 for the security features

Wi-Fi Protected Setup (WPS) Certification• To standardize an easy and secure setup solution for Wi-Fi network• User can configure the home network with WPA2-PSK easily

Types of Certifications


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Summary: Wireless Certifications Wi-Fi Alliance is a non-profit international association formed to

certify interoperability of wireless Local Area Network products based on IEEE 802.11 specification.

Wi-Fi certification ensures that compatible products from different vendors will work together.

Wireless Multimedia (WMM) certification is wireless QoS technology that maintains the priority of audio, video and voice applications in a Wi-Fi network so that other applications and traffic are less likely to slow them.

Wireless security (WPA/WPA2) certification ensures that all Wi-Fi Certified wireless products must support WPA/WPA2 for security features.

Summary: Wireless Certifications


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Questions and Answers: Wireless Certifications1. Select certification defined by Wi-Fi Alliance that maintains the

priority of audio, video and voice applications in a Wi-Fi network.A. Wi-Fi certificationB. WMM certificationC. Wireless security certificationD. WPS certification

2. Select optional programs provide by Wi-Fi Alliance. (Choose two)A. WMM power saveB. WPA/WPA2 certificationC. Wi-Fi certificationD. Wi-Fi Protected Setup

Questions and Answers: Wireless Certification


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DCS – Wireless

40



After this section, you should be capable of expressing:1. Types of AP operation modes2. Characteristics of each AP mode3. Benefits obtained for each AP mode4. General illustration on how to deploy each AP mode

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Types of AP Operation Modes There are different operation modes where wireless AP can run

• Access Point• WDS• WDS with AP• Universal Repeater• Wireless Client• WISP Repeater*• WISP Client Router*

AP Operation Modes


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* WISP Repeater and WISP Client Router Modes are supported by DAP-1160.

Access Point Mode Overview and Illustration

Access Point Operation Mode


Characteristics of AP mode• Device acts as a central connection point for any computer (client)

Benefits of using AP mode• Connect and share network resources from any mobile clients easily• Mobile connectivity regardless of the location

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Hotspot area at a cafe

ADSL Ethernet Modem

Access Point

Café guest Café guest

Wireless Distribution System Mode Overview Characteristics of WDS mode

• Wirelessly connect separate LAN that cannot be connected together with a cable

Benefits of using WDS mode• Ease-of-deployment network extension – extend the network without any

difficulties, easier than deployment of wired network infrastructure• Cost reduction – customers can connect to the remote network wirelessly

at a minimal cost

WDS Operation Mode


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WDS Mode Application

WDS Operation Mode


WDS mode application – Connect Head Office to Branch Office in different locations

• Branch office of a training center is located in Street A wants to connect its network to the Head Office located in Street B with a minimal cost.

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Branch Office

Head Office

Access point at both of the office must be WDS mode

enabled for the two network can be connected

B

A

WDS with AP Mode Overview Characteristics of WDS mode with AP

• Has the same function with WDS mode, but it can also act as an access point

• Client with wireless adapter can wirelessly connect to the AP and then connect to other LAN

Benefits of using WDS mode with AP• Ease-of-deployment network extension• Cost reduction – customers can connect to the remote network wirelessly

at a minimal cost• Flexibility – connect to any type of network (wired or wireless)

WDS with AP Operation Mode


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WDS with AP Mode Application

WDS with AP Operation Mode


Integrate separate wireless network across the campus buildings in a school• A university needs to interconnect the entire campus which includes main building

and remote business-administration faculty campus building where no wired infrastructure existed and it is just 160 meters away from the main building.

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Main campus AreaBusiness-

Administration Faculty Campus

160m

Outdoor AP Indoor AP

WDS mode enabled WDS with AP mode enabled

Mobile users associated to the

AP

Indoor AP

Running AP mode

Connected via Ethernet

Mobile users associated to the

indoor AP

Universal Repeater Mode Overview Characteristics of universal repeater mode

• Increase the range of the wireless network by extending the wireless coverage of another AP or wireless router without the need to cable installation

• The use of universal repeater mode in an access point will gain an extra 50% coverage area

• Universal repeater mode means that this mode can be used in any types of access point regardless their brand

Benefits of universal repeater mode• Expand wireless coverage area• Increase users mobility

Universal Repeater Operation Mode


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Universal Repeater Mode Application

Universal Repeater Operation Mode


Office area expansion due to new formed department• When a new department is formed, it means more space from the office will be

needed. Universal repeater mode can be used to expand the coverage area, so new department can be easily connected to the existing wireless infrastructure.

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Office area expanded

Access Point

Access Point running repeater

mode

Mobile user Mobile user

PDA user

Wired network

NO cable installation needed

Two APs connect wirelessly

Wireless Client Mode Overview and Application

Wireless Client Operation Mode


Characteristics of wireless client mode• The AP running wireless client mode enabled a wired device to act wirelessly as if it

is a wireless device• AP with wireless client mode enabled will not be visible as an access point. Hence,

it will not accept any wireless connections from client devices. Benefits of using wireless client mode

• Alternation solution to make a wired device to become a wireless device

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Wireless client mode enabled

Access Point

Wired IP Camera

Enabled the wired device (i.e. IP camera) to act as a wireless

device

Access point mode

Mobile user Ethernet client

Ethernet switch

WISP Repeater Mode Overview and Application

WISP Operation Mode


Wireless Internet Service Provider (WISP) Repeater mode / Client Router mode

• Characteristics of WISP Repeater mode– The device wirelessly connects to a WISP AP– It also acts as a router and share Internet connection for both wired and wireless clients on

the network

• Benefits of using WISP Repeater mode– Share Internet access to all clients without the need of extra device

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WISP Client

Subscribe internet connection from WISP

Signal directed to the WISP

Share WISP connection to both wired and wireless client

Mobile users can surf to the internet

Antenna directed to WISP

www.yahoo.comwww.google.com

Access Point

Running WISP Repeater mode

The AP repeats the signal received from the WISP

WISP Client Router Mode Overview and Application

WISP Operation Mode


Wireless Internet Service Provider (WISP) Client Router Mode• Characteristics of WISP client router mode

– The device wirelessly connect to a WISP AP– It also acts as a router for wired clients and provides Network Address Translation (NAT) and

DHCP server (generate IP addresses for wired clients)

• Benefits of using WISP client router mode– The WISP subscriber can share the WISP connection without the need for extra router.

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Antenna directed to WISP

WISP Client

Subscribe internet connection from WISP

Signal directed to the WISP

Share Internet connection to the wired clients

Users from the wired LAN can surf to the internet

www.yahoo.comwww.google.com

Access Point

Running WISP Client router mode

Summary D-Link wireless access points provide six operation modes which are

AP mode, WDS mode, WDS with AP mode, universal repeater mode, wireless client mode and WISP repeater modes.

AP mode functions as a central connection point for any computers (clients)

WDS mode allows to connect multiple wireless LANs together (connect separate network wirelessly).

WDS with AP mode connect separate networks wirelessly while also functions as a central connection point for any clients.

Universal repeater mode allows to repeat the wireless signal of the root access point.

Wireless client mode allows any device with an Ethernet connect to connect to the wireless network.

WISP repeater mode enabled AP function to share Internet connection to all the clients without the need of extra device.

Summary


53

Questions and Answers1. Select operation modes that can be used to connect separate

remote networks. (Choose all that apply)A. Access Point modeB. WDS modeC. WDS with AP modeD. Universal Repeater modeE. WISP Repeater mode

2. Select operation modes that do not allow clients to associate to the AP. (Choose all that apply)A. WDS modeB. WDS with AP modeC. Universal Repeater modeD. Wireless Client modeE. WISP Repeater



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Power over EthernetDCS – Wireless

55

Power over Ethernet

Power over Ethernet

After this section, you should be capable of expressing:1. What is Power over Ethernet technology (characteristics and

benefits)2. When is the most suitable time to implement PoE3. How to implement PoE technology

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Power over Ethernet (PoE) Overview

Overview

Power over Ethernet

Characteristics of PoE device• Based on IEEE 802.3af standardization• It delivers electrical power (DC voltage) to a device over the same network cable which is

used to send data• Used when the AC power supply is not available at the location where the wireless LAN

infrastructure devices are installed Benefits of PoE devices

• Increase flexibility – clients can locate the access point anywhere without having to consider the existence of power outlet

• Managed fewer cable to the power outlet. This will make the wireless infrastructure deployment easier.

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PoE Switch

Access Point Access Point Access Point

Distribute electrical power

Send and receive data

traffic

Send and receive

data traffic

PowerPower Power

Power over Ethernet Application

Application of PoE

Power over Ethernet

Setting an access point at the roof top of a building• An outdoor access point must be placed at the roof top of a building. This seems to

be an easy task, but what makes it difficult is to think how to plug the AP to the power outlet (there is no power outlet at the roof top).

• The easiest solution is using PoE switch which can delivers power to the AP. Just connect the AP to any of the switch port and connect the PoE switch to power outlet. The problem is now solved.

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Outdoor Access Point

Impossible to plug the AP directly to power outlet

for this condition

Ethernet Switch

Located somewhere at the building within

100metres from the AP

Connected using network

cable

Summary Device provides PoE feature can deliver electrical power (DC

voltage) to a device over the same network cable which is used to send data.

It is based on IEEE 802.3af standardization. PoE can be used when the AC power supply is not available at the

location where the wireless LAN infrastructure devices are installed.

Summary

Power over Ethernet

59

Questions and Answers1. Select statement that is not characteristics of PoE devices

A. Based on IEEE 802.3ad standardizationB. Deliver electrical power (DC voltage)C. Use the same network cable to send dataD. None of the above

2. Select the most common implementation of PoEA. Deliver electrical power to all network devices in the server roomB. Place an access point at the roof top of a buildingC. Network deployment in the Campus environmentD. All of the above


Power over Ethernet

60

Wireless AntennaDCS – Wireless

61

Wireless Antenna

Wireless Antenna

After this section, you should be capable of expressing:1. Types of wireless antenna and the characteristics2. Differences between each antenna3. Suitable condition to use each antenna4. Models of wireless antennas

62

Wireless Antenna Characteristics and Types Characteristics of wireless antenna

• Used on wireless devices (APs, wireless bridges, wireless routers)• Increase the output signal strength from a wireless device• Receives wireless signals from other devices such as wireless client

Types of wireless antenna• Omni-directional antenna / Dipole antenna

– Antenna which radiates the signal to all directions

• Semi-directional antenna– Antenna which radiates the signal to certain direction in a shorter but wider

coverage area

• Highly-directional antenna– Antenna which radiates the signal to certain direction in a longer but narrower

distance coverage area

Overview

Wireless Antenna

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Omni-Directional / Dipole Antenna

Types of Wireless Antennas

Wireless Antenna

Characteristics of omni-directional antenna• The most common wireless LAN antenna• The signal radiates equally in all directions• Suitable to be deployed in office area or in a building which connect multiple

networks from any directions

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360° signal radiation

All wireless device around the antenna can receive the signal

Mobile user

Outside the coverage area, user can not receive the signalMobile user

PDA user

Signal Received

Signal Received

As long as users are inside the coverage area, they still can receive the signal

✕

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Semi-Directional Antenna


Wireless Antenna

Characteristics of semi-directional antenna• Radiate the signal in a certain direction• Suitable for short coverage area• Commonly deployed in an office or an area where the coverage area is limited or

to prevent the wireless coverage goes throughout the area which allows the stranger to access the wireless resources

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Office area

Wireless coverage areaShorter but wider

Mobile user

Outside the coverage area

Can not access to network

Semi-directional antenna

Highly-Directional Antenna


Wireless Antenna

Characteristics of highly-directional antenna• Similar to semi-directional antenna which radiates the signal only to certain

direction but with longer distance of the signal radiation• Commonly deployed to connect building-to-building or area-to-area where the

distance is quite far but the signal only needs to radiate to the remote building/area (certain direction)

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Separated to different location

Signal radiation is longer but narrower

Office A

Office B

Indoor Antenna Directional Antenna

Omni-Directional Antenna

Models of D-Link Wireless Antennas

Wireless Antenna

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DWL-R60AT ANT24-0600

DWL-50ATANT24-0501 ANT24-0700cANT24-0501cANT24-0502ANT24-0700

Outdoor Antenna


Wireless Antenna

Directional Antenna for Point-to-Point transmission

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ANT24-0801 ANT24-1400 ANT24-1201

ANT70-1800

ANT70-1000 ANT24-1800

ANT24-1200

ANT24-1801

Outdoor Antenna


Wireless Antenna

Omni-Directional Antenna for Point-to-Multi-Point transmission

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ANT24-0800 ANT24-0500 ANT70-0800ANT70-0801

New Product Sector Antenna

Locate Omni-Directional Antenna here

Maximum Distance of D-Link Wireless Antennas

Maximum Distance of D-Link Wireless Antennas

Wireless Antenna

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8dBi5dBi

PtMP(Omni)

ANT24-CB06N

ANT24-CB03N

ANT24-CB09N

2.0km 3.0km2.5km0.5km 1.5km1.0km (5.5km)

8.5dBi

14dBi 18dBi

PtP(Dir.) Patch

Outdoor 500m~2km

Outdoor 2km~5km

6dBi Patch

12dBi

PtMP(Dir.) Omni ANT24-0500

ANT24-0800ANT70-0800ANT70-0801

ANT24-CB06N

ANT24-CB03N

ANT24-CB09N

ANT24-0801ANT24-1200ANT70-1000

ANT24-1201

8dBi ANT24-1400ANT70-1800

(2.4GHz)

ANT24-1800 ANT24-1801ANT70-1800

(5GHz)

Summary There are three types of wireless antennas: Omni-directional / dipole

antenna, semi-directional antenna, and highly directional antenna. Omni-directional antenna is used to radiates the signal to all

directions. Semi-directional antenna is used to radiates the signal to certain

direction in a shorter but wider coverage area. Highly-directional antenna is used to radiates the signal to certain

direction in a narrower but longer distance of the signal radiation. There are both indoor antenna and outdoor antenna.

Summary

Wireless Antenna

71

Questions and Answers1. Select wireless antennas that radiate signal only to certain direction.

(Choose two)A. Omni-directional antennaB. Dipole antennaC. Semi-directional antennaD. Highly-directional antenna

2. Select wireless antenna that is most suitable to connect two buildings.A. Omni-directional antennaB. Dipole antennaC. Semi-directional antennaD. Highly-directional antenna

3. Select the advantages of using wireless antenna. (Choose all that apply)A. Increase the output of signal strength receives from wireless device\B. Receive wireless signal from wireless clientsC. Prevent unauthorized user from receiving the signal from the APD. Classified into the way it radiates the signal


Wireless Antenna

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Wireless SecurityDCS – Wireless

73

Wireless Security

Wireless Security

After this section, you should be capable of expressing:1. Risks of deploying WLAN2. How to overcome security issues (the risk of deploying WLAN)3. Characteristics of WEP, WPA/WPA2 and the differences between

each other4. What is RADIUS and the way it authenticates users5. What is MAC filtering

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Risk of Deploying Wireless LAN (1)

Risk of WLAN

Wireless Security

Unauthorized users may access the network facilities such as Internet connection freely

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Wireless coverage area excess the office

This may allow unauthorized users to access network resources from the office

Unauthorizeduser

Wireless network detected!!! Try to connect to the network…

Wireless network connected successfully!!!DANGER!!!

Page is Animated

Risk of Deploying Wireless LAN (2)

Risk of WLAN

Wireless Security

Some people try to get some important / confidential data sent through the air by using wireless

76

Hotspot area

User A

Access Point

User A is browsing the Internet and send confidential data

Confidential data is send to the AP

The hacker comes in and try to sniff the data

Data SNIFFED!!!

RECEIVE ALL the data(Password, Credit card number, etc)

DANGER!!!

Hacker

Risk of WLAN in public area

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Solutions for Security Issues Overview Configure wireless security on your WLAN with one or more of the

methods below• Wired Equivalent Privacy (WEP)

– Weak authentication method using static key

• Wi-Fi Protected Access (WPA/WPA2)– Strong authentication method using dynamic key

• Remote Access Dial-Up Service (RADIUS)– Centralized authentication user’s protocol

• MAC Filtering / IP Filtering– Allow clients to join the network based on client’s MAC address / IP address

• WLAN Partition– Isolate the wireless network, so mobile clients are not allowed to exchange

data through the access point

Solutions for Security Issues

Wireless Security

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Wired Equivalent Privacy (WEP) Overview Characteristics of WEP

• Most basic security for wireless LAN• Commonly used for home users, but is not suitable to be implemented

for enterprise environment• All the clients must share the same key with the one configured in the

access point in order to communicate with each other Weaknesses of WEP

• Password hold by all clients is never changed unless the administrator change it (static key)

• Most vulnerable security type which can be easily cracked by using hacking tools


Wireless Security

78

Wired Equivalent Privacy (WEP) Illustration


Wireless Security

Illustration on how WEP works

79

Access point configured with WEPUser A

User A and user B want to connect to the network

Send request for association Receive the request

I’ve received the requests,What is the shared key?

Send request for association

User B

Shared Key = abc

I want to join the network

I also want to join the network

Challenge

Shared Key = abc Shared Key = xyz

Respond the challenge Respond the challenge

Key = abcUser A, Password matched.

User authenticated

Password matched

Password unmatched

User A welcome to the network!!!

User B, Password unmatched.

Request rejected

Request rejected

Association failed

Challenge

Key = xyz

➀ ➀

➁ ➁➂ ➂

➃

➄

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Wi-Fi Protected Access (WPA) Overview Characteristics of WPA

• Improved version of WEP• This infrastructure includes clients, access points and authentication

servers (typically RADIUS servers)• Key always changes automatically (dynamic key)

Benefits of using WPA instead of WEP• Provide a stronger method of authentication compared to WEP


Wireless Security

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WPA2 Overview Characteristics of WPA2

• Personal mode – protects unauthorized network access by utilizing a set-up password

• Enterprise mode – Authenticate network clients through a server, usually is RADIUS server

• Compatible (can communicate) with device secured using WPA authentication method

• Similar to WPA authentication method, the main difference is that WPA2 uses more advanced encryption technique

WPA WPA2

Enterprise Mode(Business, Government, Education)

Authentication: IEEE 802.1X/EAPEncryption: TKIP/MIC

Authentication: IEEE 802.1X/EAPEncryption: AES-CCMP

Personal Mode(SOHO, Home/Personal)

Authentication: PSKEncryption: TKIP/MIC

Authentication: PSKEncryption: AES-CCMP


Wireless Security

81

Different authentication methods for different environment

WPA / WPA2 Illustration


Wireless Security

WPA / WPA2 provide stronger authentication method with dynamic encrypted key per user, per session, and per packet data

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Access Point configured with WPA/WPA2

Mobile user

Request for association Compare the encrypted keyEncrypted key

Key matched!Allow the user to join

the network

Client join the network successfully

User want to send data

Data + key1Compare the encrypted key

Key matched!Data received

Every time user send data to the AP, the data will sent along with dynamic key

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Differences between WEP, WPA and WPA2Differences between WEP – WPA – WPA2 are shown in the table below

WEP WPA WPA2

Encryption method

WEP/RC4 TKIP/RC4 CCMP/AES

Security level Weak Strong Strongest

Main characteristic

Use static key Use dynamic key Use dynamic key


Wireless Security

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Remote Access Dial-Up Service Overview Characteristics of RADIUS

• A protocol for centralized remote user authentication and accounting• RADIUS stores the authentication data either locally at the RADIUS server

or in an external database• RADIUS accounting can be used independently to log certain events

Benefits RADIUS• RADIUS enables centralized management of authentication data, such as

usernames and passwords• Significantly increase security by enabling the centralization of password

management


Wireless Security

84

Step-by-Step RADIUS Operation


Wireless Security

Steps which are done by RADIUS to authenticate the client1. Client attempts to connect to the access point2. Access point prompts for username and password or challenge3. User replies4. RADIUS client sends username and encrypted password to the RADIUS server5. RADIUS server responds with Accept, Reject6. When access-accept message received and RADIUS accounting is enabled, access point sends a

RADIUS Accounting-Request (Start) message to the RADIUS Server

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RADIUS Server

Mobile user Access Point

RADIUS Client

1

2

3

4

5

6

Server adds an accounting record to its log and acknowledges the request

Authentication process

Authorization process

Accounting process

MAC Filtering Overview


Wireless Security

Characteristics of MAC Filtering• Easily control which computers can gain access to the network based on specific

MAC address• Rarely used as a single method because it can be hacked easily by anyone using

tools that can alter the MAC address on the wireless adapter Advantages of MAC Filtering

• It does not affect the network performance

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List of allowed MAC address

AA

BB

CC

User AMAC: AA

User EMAC: EE

User A attempt to join the network

AP check client’s MAC address from the database

MAC address is in the list

Allow User A to join the network

User E attempt to join the network

MAC address is not in the list

User E cannot join the network

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Summary When deploying wireless technology in a network, security becomes

the main issue. Some risks such as unauthorized users trying to access internal network or get some important/confidential data sent through the air by using wireless have to be considered.

To prevent these unwanted conditions, security enhancement is needed. This can be achieved by configuring security method to the network.

Methods provided are by applying authentication to all users with one of the following: WEP, WPA, WPA2 or using RADIUS authentication. Other methods that can be additional security enhancement is implementing MAC filtering.

Summary

Wireless Security

87

Questions and Answers1. Select security method that provides the weakest authentication method using

static key.A. WEPB. WPAC. WPA2D. MAC Filtering

2. Select the reason why WPA2 is more superior than WPA.A. It protects unauthorized network access by utilized a dynamic keyB. The encryption of data is upgraded with Advanced Encryption Standard (AES)C. It can filter users based on specific physical addressD. It enables centralized management of authentication data

3. Select the statement that does not describe RADIUS.A. Protocol for centralized user authentication and accountingB. Provide three steps of operation which include authentication, authorization and

accountingC. The accounting features of the RADIUS protocol cannot be used independently of

RADIUS authentication or authorizationD. Centralized password management


Wireless Security

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Questions and Answers4. Select statements that describe MAC filtering. (Choose all that

apply)A. Often used as single security methodB. Strongest authentication method because MAC address cannot be

modifiedC. Control access to the network based on specific logical addressD. Control access to the network based on specific physical address


Wireless Security

89

D-Link Wireless ProductDCS – Wireless

90



After this section, you should be capable of expressing:1. Features for each D-Link Access Point2. Feature differences between D-Link Access Points

91

DWL-2100AP Features OverviewConfigurable Operation Modes

• Access Point• WDS with AP• WDS• AP Repeater• AP Client

Connectivity Performance

• 802.11g wireless standard• Up to 108Mbps (Turbo Mode) Wireless Speed• Wireless connection to Ethernet network / servers through 10/100BASE-TX port• AP grouping for Load Balancing

Security / QoS • 64/128/152-bit WEP data encryption• WPA/WPA2 Personal and Enterprise security with TKIP and AES support• User access control MAC address filtering• Wireless Station Partition (STA), 802.1Q VLAN tagging and Multiple SSID (Up to

8) for network segmentation• WMM (Wi-Fi) Multimedia Certified

Setup / Management

• Windows-based AP manager utility• Web-based management with SSL• Remote management using Telnet or SSH• Built-in MIB for SNMP management (SNMPv3)• IP address limit for management access• System log

D-Link Indoor Access Points


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• Access Point• WDS with AP• WDS


• 802.11g wireless standard• 802.3af Power over Ethernet• Up to 108Mbps (Turbo Mode) Wireless Speed• Wireless connection to Ethernet network / servers through 10/100BASE-TX port• AP grouping for Load Balancing

Security / QoS • 64/128/152-bit WEP data encryption• WPA/WPA2 Personal and Enterprise security with TKIP and AES support• User access control MAC address filtering• Wireless Station Partition (STA), 802.1Q VLAN tagging and Multiple SSID (Up to

4) for network segmentation• WMM (Wi-Fi) Multimedia Certified

Setup / Management

• Windows-based AP manager utility• Web-based management (HTTP)• Remote management using Telnet• Built-in MIB for SNMP management (SNMPv3)• System log



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• 802.11g wireless standard• 802.3af Power over Ethernet• Up to 108Mbps (Turbo Mode) Wireless Speed

Security / QoS

• 64/128/152-bit WEP data encryption• WPA/WPA2 Personal and Enterprise security with TKIP and AES support• User access control MAC address filtering• Wireless Station Partition (STA), 802.1Q VLAN tagging and Multiple SSID

(Up to 8) for network segmentation• WMM (Wi-Fi) Multimedia Certified• Rogue AP detection

Setup / Management

• Windows-based AP manager utility• Web-based management (HTTP and HTTPS)• Remote management using Telnet and SSH• Built-in MIB for SNMP management (SNMPv3)• System log



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• Access Point• WDS (PtP, PtMP)• Repeater• Wireless Client


• 802.11a/b/g wireless standards• 802.3af Power over Ethernet• Up to 108Mbps (Turbo Mode) Wireless Speed

Security / QoS

• 64/128/152-bit WEP data encryption• WPA Personal and Enterprise security with TKIP and AES support• User access control MAC address filtering• Wireless Station Partition (STA)

Setup / Management

• Windows-based AP manager utility• Web-based management (HTTP)• Remote management using Telnet• Built-in MIB for SNMP management (SNMPv3)• System log



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• Access Point• WDS with AP• WDS/Bridge (No AP Broadcasting)


• 802.11a/g wireless standard• Dual-band operation (2.4GHz and 5GHz)• Up to 108Mbps (Turbo Mode) Wireless Speed• Dual Ethernet ports with 802.3x flow control

Security / QoS

• 64/128/152-bit WEP data encryption• WPA/WPA2 Personal and Enterprise security with EAP and PSK support• WPA PSK/AES over WDS• User access control MAC address filtering• Wireless Station Partition (STA), 802.1Q VLAN tagging and Multiple SSID

(Up to 16) for network segmentation• WMM (Wi-Fi) Multimedia Certified• Rogue AP detection

Setup / Management




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• 802.11g wireless standard• 802.3af Power over Ethernet• Up to 108Mbps (Turbo Mode) Wireless Speed• Dual Ethernet ports with 802.3x flow control• Load Balancing• Wireless connection to Ethernet network/servers through 10/100BASE-TX port

Security / QoS • 64/128/152-bit WEP data encryption• WPA/WPA2 Personal and Enterprise security with EAP and PSK support• WPA PSK/AES over WDS• User access control MAC address filtering• Wireless Station Partition (STA), 802.1Q VLAN tagging and Multiple SSID (Up to

8) Multiple SSID for network segmentation• WMM (Wi-Fi) Multimedia Certified• Rogue AP detection

Setup / Management


D-Link Outdoor Access Points


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• 802.11a/g wireless standards• 802.3af Power over Ethernet• Load Balancing• Wireless connection to Ethernet network / servers through 10/100BASE-

TX port

Security / QoS

• 64/128/152-bit WEP data encryption• WPA/WPA2 Personal and Enterprise security with EAP and PSK support• User access control MAC address filtering• Wireless Station Partition (STA), 802.1Q VLAN tagging and Multiple SSID

(UP to 4) for network segmentation

Setup / Management

• Windows-based AP manager utility• Web-based management• Remote management using Telnet• Built-in MIB for SNMP management (SNMPv3)• System log



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DAP-3220 Features OverviewCharacteristics • Water / dustproof IP65 standard

• Internal thermostat and heater• Steal-proof design• Convenient outdoor installation with locking brackets included

Configurable Operation Modes

• Access Point• WDS with AP• WDS• Wireless Client


• 802.11g wireless standard• Up to 108Mbps Wireless Speed (when operating with other D-Link 108G devices)• 802.3af Power over Ethernet

Security / QoS • Multiple SSID and 802.1Q VLAN tagging• MAC address filtering• Rogue AP detection• WPA/WPA2 Personal / Enterprise• WPA PSK/AES over WDS• 64/128/152-bit WEP Encryption• WMM (QoS)

Setup / Management

• Web browser (HTTP / HTTPS)• CLI using Telnet / SSH• SNMPv3 (D-View module / private MIB)• AP Manager II Software included



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Summary D-Link provides several access points with various features where

users can choose it flexibly depends on their requirements. D-Link provides two types of access points: indoor access points and

outdoor access points. For indoor access points, the models are DWL-2100AP, DWL-2200AP,

DWL-3200AP, DWL-3260AP, DWL-7100AP, DWL-8200AP. For outdoor access points, the models are DWL-2700AP, DWL-

7700AP, DAP-3220. DAP-3220 is D-Link new model for outdoor AP.

Summary


100

Questions and Answers1. Select D-Link outdoor access point models. (Choose two)

A. DWL-2200APB. DWL-2700APC. DWL-7100APD. DWL-7700AP

2. Select D-Link indoor access point models. (Choose all that apply)A. DWL-2100APB. DWL-2200APC. DWL-2700APD. DWL-7100APE. DWL-7700AP

3. Select model that can run on either 2.4GHz or 5GHz frequency.A. DWL-2100APB. DWL-2200APC. DWL-2700APD. DWL-8200AP



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Wireless SolutionDCS – Wireless

102

Wireless Solution

Wireless Solution

After this section, you should be capable of expressing:1. What is Multiple SSID2. Characteristics and benefits of deploying wireless WLAN3. When to deploy wireless VLAN4. Characteristics and advantages of wireless roaming5. Characteristics and benefits of 802.1p priority queue6. What is rogue AP detection and the benefits of this feature7. What is SNMP8. What is D-View SNMP Network Management System and its benefits9. Characteristics and benefits of QoS WMM

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Multiple SSID

Wireless VLAN

Wireless Solution

By assigning multiple SSIDs to the access point, it logically divides the access point into several virtual access point within a single hardware device.

Each Virtual AP appears to stations (STAs) to be an independent physical AP.

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Virtually divided into several APs

SSID_1 SSID_2 SSID_3

Multiple SSID

Virtual AP Virtual AP Virtual AP

Mobile user

Wireless network detected!!!

SSID_1, SSID_2, SSID_3

Wireless VLAN Overview Characteristics of wireless VLAN

• Wireless VLANs define the area where clients are logically grouped into one segment

• In the wireless VLANs, multiple SSIDs are applied (each VLAN hold different SSIDs)

• Each SSID is mapped to a VLAN-ID Benefits of deploying wireless VLAN

• Segment users into different department without additional device• Enable the separation of wireless applications based on security and

performance requirements

Wireless VLAN

Wireless Solution

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Common Wireless VLAN Infrastructure

Wireless VLAN

Wireless Solution

Wireless VLAN applied in the office which consist of two departments (Operational and Marketing). There are three VLANs configured for each department and for guests to separate the company’s policies between each VLAN.

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Layer 3 Switch

802.1q trunk

802.1q trunk

AP_1

AP_2

SSID=Operational

SSID=Marketing

SSID=Guest

SSID=Operational

SSID=Marketing

SSID VLAN ID Security Policy

Marketing 20 WPA/WPA2

Operational 30 WPA/WPA2

Guest 40 Open

Wireless Roaming Overview Characteristics of wireless roaming

• Enables personalized, seamless and secure connectivity for mobile customers when moving across different WLANs.

• Wireless Roaming maintains client’s connectivity so that clients do not need to re-authenticate and re-login every time they move to different WLANs.

Advantages of wireless roaming• Increased effectiveness• Increased flexibility

Roaming

Wireless Solution

107

Common Application of Wireless Roaming

Roaming

Wireless Solution

108

PDA User

User connected to network A

Access Point

Network A

Access Point

Network B

The user is movingUser disconnected from the network

PDA User PDA User

User connected to network B

User attempt to connect to AP The user is moving againUser attempt to connect to APUser connected to network A

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Priority Queue (802.1p) Overview Characteristics of 802.1p Priority Queue

• A specification to give Layer 2 switches the ability to prioritize traffic (and perform dynamic multicast filtering)

• Eight classes of traffic types are defined by 802.1p Benefits of 802.1p Priority Queue

• Critical data traffic can be prioritized

Priority Queue

Wireless Solution

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Rogue AP Detection Overview

Rogue AP Detection

Wireless Solution

Typically, rogue APs are connected to a network by well-intentioned employees unaware of the security risks they cause

Advantages of rogue AP protection• Automatically detect rogue AP

based on criteria specified by the administrator

• Administrator can add rogue APs to the AP list

• Better control of the network’s environment which will help to avoid RF interference and minimize bandwidth utilization

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SNMP Overview

Single Network Management Protocol

Wireless Solution

Definition of SNMP• Simple Network Management Protocol (SNMP) is a set of protocols for managing

complex networks used in network management systems to monitor network-attached devices for conditions that warrant administrative attention.

• SNMP enables network administrators to manage network performance, find and solve network problems, and plan for network growth

Implementation of SNMP• An SNMP-managed network consists of three key components: managed devices,

agents and network-management systems (NMSs)

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D-View SNMP Network Management System D-View Overview

• D-Link SNMP Network Management System is a comprehensive standard-based management tool designed to centrally manage critical network characteristics such as availability, responsiveness, resilience and security in a consistent way.

• D-View provides useful tools to allow the user to effectively manage device configurations, fault tolerance, performance, security and accounting services

Features and benefits• Modular architecture• Managing third-party devices• Microsoft Access format database• Versatile features• User Account Management & Billing System Outfitted in Professional

Version

Single Network Management Protocol

Wireless Solution

112

Quality of Service - WMM Characteristics of QoS (Wi-Fi Multimedia)

• Provides basic QoS features to IEEE 802.11 networks• WMM prioritizes traffic according to the four ACs (Access Categories) –

voice, video, best effort, and background• Suitable for simple applications that require QoS, such as VoIP on Wi-Fi

phones Advantages of WMM

• Interoperability• Availability• Wide appeal• User confidence• Coexists with devices that do not support WMM• Adapts well to dynamic data rates• Compatible with Universal Plug and Play (UPnP) QoS

Quality of Service

Wireless Solution

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Summary Multiple SSID is used to logically devices the access point into

several virtual access point within a single hardware device. Multiple SSID is usually applied when implement wireless VLAN. Wireless VLAN enables the separation of wireless applications based

on security and performance requirements. Wireless Roaming maintains client’s connectivity so clients do not

need to re-authenticate and re-login every time they move to different WLAN.

802.1p is a specification to give Layer 2 switches the ability to prioritize traffic (and perform dynamic multicast filtering).

Rogue AP detection is used to detect rogue AP based on criteria specified by the administrator.

Simple Network Management Protocol (SNMP) enables network administrators to manage network performance, find and solve network problems, and plan for network growth.

WMM prioritizes traffic to 802.11 networks according to the four ACs (Access Categories) – voice, video, best effort and background.

Summary

Wireless Solution

114

Questions and Answers1. Select two options that are required to deploy wireless VLAN. (Choose all that

apply)A. Multiple SSID is appliedB. To deploy VLAN, users from different group must be associated to different APC. One SSID is used to all VLANs in the networkD. Each SSID is mapped to a VLAN ID

2. Select feature that enable consistent connectivity for mobile customers when moving across different WLAN.

A. Wireless VLANB. Wireless roamingC. Quality of ServiceD. Priority Queue

3. Select advantages of Rogue AP Protection feature. (Choose all that apply)A. Remove rogue AP found from the networkB. Blacklist all rogue AP found in the network automaticallyC. Avoid RF interferenceD. Minimize bandwidth utilization


Wireless Solution

115

Questions and Answers4. Select categories uses to prioritize data traffic in the network using

WMM. (Choose all that apply)A. VoiceB. VideoC. ForegroundD. Data size

5. Select traffic type that are defined by 802.1p. (Choose all that apply)A. Data-critical trafficsB. Delay-sensitive applicationsC. Control-Load applicationsD. Background applications


Wireless Solution

116

Wireless ApplicationDCS – Wireless

117



After this section, you should be capable of expressing:1. Where wireless technology is usually applied

118

Small Office Home Office (SOHO)

Application Illustration Example


Wireless application are now commonly used in the SOHO or small business environment, where there is one (or more) access point connect to the LAN and WLAN. Sometimes, it also connects to the Internet for the client to gain access to it.

119

Meeting Area

Network printer Access Point

Connect WLAN and LAN

Wireless routerFor Internet sharing

Small office layout

Mobile users

Ethernet client

Ethernet client

Extending Existing Network Infrastructure



Wireless network can serves as a network extension which connect to the wired network or connect to another wireless network in different location.

For example, there are another network in different floor or even in different building.

120

PDA client

Mobile client

Mobile client

Office Area

Wired network

Server Farm

PDA clientMobile client

Warehouse areal

Antenna

Different networks can be connected

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Network Infrastructure in Public Area for Mobile Computing



Wireless network mainly supports mobility and flexibility where mobile users can gain network access easily.

Nowadays, there are many public area facilitate wireless hotspot area, for example: Malls, Cafes, Hospitals, etc.

121

Hotspot area at a restaurant Wireless coverage area

Access pointMobile user

PDA user

Mobile user

Connecting Network Between Two Buildings



Wireless network can implemented to connect two buildings at different areas.

One real case that had been implemented recently in Singapore was deployment of wireless network infrastructure as a backup connection to provide redundancy from Mount Faber cable car station to Harbourfront Tower 2 cable car station to cable station at Sentosa Island.

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Office A Office B

Located at two different location

Deploy wireless network infrastructure to Sentosa Island

Site Survey Consideration

Site Survey Consideration


Main Point• Decide type and model of antenna that will be used• Decide the quality of the antenna

Second Point• Consider the interference issue (building, tower, trees, etc)• Consider the throughput require and distance between building (Point-to-Point or

Point-to-Multi-Port)• Consider the number of base stations

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Max. distance supported

Total bandwidth given. (E.g. 11Mbps)

Wireless ISP Application

Deploy a Wireless Application


Equipment Required:• Omni-directional antenna• Directional antenna• Outdoor access point• Wireless router• Wireless LAN card

Deployment Steps:1. Select a center location2. Setup AP and outdoor omni-

directional antenna3. Setup modem to connect to the

Internet4. Setup directional antenna to receive

the signal from the center5. Use wireless LAN card to receive the

signal from the outside

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1, 2

3

5

4

School Roaming Application

Deploy a Wireless Application


Equipment Required:• Omni-directional antenna• Directional antenna• Outdoor access point

Deployment Steps:1. Use wireless technology using 5.0

GHz of frequency (low noise) as a backbone

2. Setup directional antenna to receive the signal from the backbone

3. Setup Omni antenna to transmit signal for students using roaming by 2.4GHz)

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Summary There is no (or few) restrictions when deploying wireless network. Its

flexibility makes wireless technology to be widely applied for most conditions and requirements.

Wireless technology can be applied in SOHO, to extend existing network infrastructure, to provide Internet connectivity in public area, to connect remote networks and many more.

Summary


126

Questions and Answers1. Select common purposes when implement wireless technology.

(Choose all that apply)A. Connect networks between buildingsB. Shrink existing network infrastructureC. Increase mobility and flexibilityD. All of the above



127


DCS – Wireless

128

D-Link Unified Access System Unified Access System Overview D-Link Unified Wireless Switch D-Link Wireless Switch Features and Advantages D-Link Unified Access Point Market Analysis for D-Link Wireless Switch Wireless Switch Deployment Application Success Stories


129

Unified Access System Overview


After this section, you should be capable of expressing:1. Characteristics of legacy WLAN deployment2. What are common customer needs to improve legacy WLAN

deployment3. Solutions provided by D-Link for these customer needs4. What is Unified Access System Solution5. How to deploy unified access system using overlay solution or

unified solution

Unified Access System Overview

130

Characteristics of Legacy WLAN Deployment

Legacy WLAN Deployment


131

Decentralized AP configuration, security

and management

Complex network management causes inefficiency in time

Difficult to maintain wireless area

coverage

Channel overlapping causes network performance degradation

Layer 3 SwitchServer Farm

Layer 2 switch Layer 2 switch

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Illustration of Legacy WLAN

Legacy WLAN Deployment


132

Server Room

Server FarmAccess Point

Access Point

Access Point

Access Point

Channel 6

Coverage hole

Channel overlap causes network performance down

to 50%

Power level is too weak

Rogue AP

RF Interference

Security breach

Layer 2 switch

Layer 3 Switch

Customer Needs Unified wired and wireless access system United management and security

• Centralized AP and client management• Rogue AP detection / mitigation

Better performance• Guarantee on no-overlapping wireless coverage area

Seamless roaming

Customer Needs and D-Link Solution


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D-Link Unified Access System Solution D-Link Unified Access System Solution can provide:

• Unified Switching (=Wireless Controller + L2+ Switch)• Centralized Policy Management• Automatic Power/Channel Adjustment• AP Load Balancing• Fast L2/L3 Roaming• Rogue AP Management• Log for Dynamic RF Status

Customer Needs and D-Link Solution


134

All D-LINK features above give what customer needs for unified network infrastructure and for better performance

Introduction to Unified Access System Solution What is Unified Access System Solution

• D-Link solution that enables WLAN deployment while providing state-of-the-art wireless networking features.

• It provides secure wireless connectivity and seamless layer 2 and layer 3 roaming for end users.

D-Link Unified Access System Component• D-Link Unified Switch (DWS-3024 and DWS-3026)• D-Link Unified Access Point (DWL-3500AP and DWL-8500AP)

Introduction to Wireless Switch


135

Overlay Solution

Wireless Switch Deployment Solution


In overlay solution deployment, Wireless switch is introduced into existing network infrastructure to protect current investment in network infrastructure with all the benefits of WLAN switching.

136

Wireless Switch Layer 3 Switch Server Farm

Layer 2 switch Layer 2 switch

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Unified Solution

Wireless Switch Deployment Solution


Unified Solution / Converged Edge Deployment• Deploy at the network edge for greatest scalability• Peer-to-peer WLAN Switches facilitate “Converged” WLAN Edge by distributing

WLAN Switching capability• Full Gigabit Ethernet speed ready for next generation 802.11n

137

Layer 2 switchLayer 2 switchWireless Switch Wireless Switch

Layer 3 Switch Server Farm

All layer 2 switches are replaced with wireless switch

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Summary: D-Link Unified Access System Overview

On larger networks the legacy wireless deployment may cause several difficulties such as time consuming network management which then make customer needs a new solution that provides centralized network management.

D-Link provides solution to cover those problems faces by the customer with D-Link Unified Access System Solution.

D-Link Unified Access System is a wireless local area network (WLAN) solution that enables WLAN deployment while providing state-of-the-art wireless networking features.

To implement D-Link unified access system solution, it requires D-Link wireless switch and D-Link unified access point.

Customers can deploy the unified access system solution using either overlay solution or unified solution.

Summary: D-Link Unified Access System Overview


138

Questions and Answers: D-Link Unified Access System Overview1. Select devices that are component of D-Link Unified Access System. (Choose all that

apply)A. DWS-3024 and DWS-3026B. DWL-3260APC. DWL-3500APD. DWL-8200APE. DWL-8500AP

2. Select characteristics of overlay solution deployment for D-Link unified access system. (Choose all that apply)

A. With this solution, the wireless APs are not connected to the wireless switch directlyB. With this solution, the deployment of wireless switches is at the network edgeC. Peer-to-peer WLAN switches facilitate “converged” WLAN Edge by distributing WLAN Switching

capabilityD. Alls customers to keep their existing network hardware/switches

3. Select characteristics of unified solution deployment for D-Link unified access system. (Choose all that apply)

A. With this solution, the wireless AP’s are not connected to the wireless switch directlyB. With this solution, the deployment of wireless switches is at the network edgeC. Peer-to-peer WLAN switches facilitate “converged” WLAN Edge by distributing WLAN Switching

capabilityD. Allows customers to keep their existing network hardware/switches

Questions and Answers: D-Link Unified Access System Overview


139

D-Link Unified Wireless Switch


After this section, you should be capable of expressing:1. Functions of Unified Wireless Switch2. Models for D-Link Unified Wireless Switch3. Advantages of Unified Wireless Switch4. Features of Unified Wireless Switch


140

Unified Wireless Switch Overview Unified Wireless Switch allows to control the discovery, validation,

authentication, and monitoring of peer unified switches, D-Link Access Points, and clients on the WLAN, including discovery and status of rogue APs and clients.

The D-Link Unified Access System works with the following D-Link switches:• DWS-3024 (24 GE ports)• DWS-3026 (24 GE ports + 2 10GE ports)



141

Unified Wireless Switch Advantages Core units controlling entire wireless network High performance, easy deployment 24 Gigabit ports, no restriction on port usage Scalable expansion & unified wired/wireless deployment Authentication, security & power management Simplified configuration & deployment Maximum performance Maximum network performance Maximum investment protection



142

Unified Wireless Switch Features List (1)Centralized management of wireless network

• Track and maintain user authentication as users roam throughout the network

• Intelligently designates users to virtual groups based on user’s authenticated identity

• Provide scaled, resilient, integrated management infrastructure

• Centrally manage user authentication/security policies• Provide key management for each security protocol• Configure and control all connected access points

Scalable unified wired/wireless network infrastructure

• 24 10/100/1000BASE-T Gigabit ports• Up to 48 wireless APs direct/indirect connections• Mixed wired/wireless connection from any port• Four combo SFP for flexible fiber connection• Two open slots for optional 10-Gigabit attachment to fiber

backbone*• Expandable to four peer switches

Simplified and resilient network deployment

• 802.3af Power over Ethernet simplify AP installation• Gigabit connection ready for future wireless speed upgrade• Redundant power supply support maximizes network uptime



143

* Available on DWS-3026 only

Unified Wireless Switch Features List (2)Security management • 64/128/152-bit WEP data encryption

• WPA/WPA2 personal• WPA/WPA2 enterprise• MAC address filtering• Rouge AP classification and detection

Bandwidth and power management

• Auto-adjust RF channels for AP• Provide fast intra-switch or inter-switch roaming• Advanced inter-subnet roaming• Auto-adjust transmit output for AP• Allow remote boot of AP

LAN management • L2+ features: spanning tree, 802.3ad link aggregation, port mirroring, jumbo frames

• IPv4 packet routing• QoS with 802.1p priority queues, granular bandwidth control• LAN security with ACL, RADIUS, TACACS+ authentication, DoS

prevention, broadcast storm control

Secure and versatile management

• Web access using HTTP• Telnet server/client• SSH v2, SSLv3• SNMP v1, v2c, v3, RMON• SYSLOG, Dual image• CLI



144

Summary: D-Link Unified Wireless Switch Wireless Switch allows to control the discovery, validation,

authentication, and monitoring of peer unified switches, D-Link access points, and clients on the WLAN, including discover and status of rogue APs and clients.

D-Link provides DWS-3024 and DWS-3026 for Unified Wireless Switch.

D-Link Unified Wireless Switch offers several advanced features to manage the entire network.

Summary: D-Link Unified Wireless Switch


145

Questions and Answers: D-Link Unified Wireless Switch1. Select statement that shows the difference between DWS-3024 and

DWS-3026.A. Control entire wireless networkB. Only DWS-3026 supports WPA2 authentication methodC. Only DWS-3024 provides four combo SFP for flexible fiber connectionD. DWS-3026 provides two open slots for optional 10-Gigabit attachment to

fiber or copper backbone

2. Select advantages of unified wireless switch. (Choose all that apply)A. Control the entire wireless networkB. Unified wired/wireless networkC. High level of security by applying restrictions on port usageD. Support IPv6 packet routing

Questions and Answers: D-Link Unified Wireless Switch


146

D-Link Wireless Switch’s Features and Advantages Overview


After this section, you should be capable of expressing:1. What is pre-set configuration and centralized management and its

benefits2. What is automatic channel adjustment and the benefits3. What is automatic power adjustment and the benefits4. Characteristics of load balancing and the way it works5. What is rogue AP management and the benefits6. Characteristics and benefits of fast roaming7. Network monitoring in D-Link wireless switch and WLAN

visualization8. Capabilities of D-Link wireless switch that support large scale WLAN

deployment

Wireless Switch Features and Advantages

147

D-Link Wireless Switch Features and Advantages

Pre-set configuration and centralized AP management RF management

• Automatic channel adjustment• Automatic power adjustment

Self-healing wireless network• Load balancing

Enhanced security enforcement Fast wireless roaming Simple network monitoring Suitable for medium to large scale network deployment



148

D-Link wireless switch + unified access point

Pre-set Configuration and Centralized Management



Security can be pre-set and management of AP can be centralized• The Profile configuration is applied to a managed AP on the event such as when an

AP initially transitions to managed mode, or when AP is reset.• Wireless switch will automatically detect all APs attached to the switch.• When an AP is removed or added, the switch automatically configures new AP with

same configuration of replaced unit.

149

Wireless switch

AP-1

AP-2

AP-3

1> AP-3 appear and attached to a

wireless switch port

2> New AP detected!!!

APs detected on the network

AP-1

AP-2AP-3

3> Configured AP with the pre-set profile

configuration

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Pre-set Configuration and Centralized Management



Central Policy Control• Security setting/configuration can be saved even when the AP is powered off.

150

Wireless Switch L3-switch

L2-switch

Access points attached to the network

Pre-set profile

configuration

Content of pre-set profile configuration packet:

•RADIUS server settings

•Security settings

•Radio configuration

•SSIDs, VLAN & Tunnel setting

•QoS configuration

Pre-set profile

configuration

Pre-set profile

configuration

Pre-set profile

configuration

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RF Management



Automatic channel adjustment• Wireless Switch automatically adjusts channels in the controlled access points in

an event such as a new AP being added or being removed• Wireless Switch can be programmed to automatically readjust channels

periodically at certain time or upon a certain interval.

151

Wireless Switch

Channel 36

Channel 40

Channel 44

Channel 48

New AP attached to the networkScan RF area for occupied channel…Select non-interfering channel

Channel 44Appear rogue AP

which using channel 44

Experience signal interference,Change channel

Channel 52

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RF Management



Automatic power adjustment• Automatically adjust the RF signal to broadcast far enough to reach wireless

clients, but not so far that it interferes with RF signals broadcast by other APs.• When a managed AP is powered down, the power of its neighboring AP(s) managed

by the same switch is immediately increased by 20% (Fail-safe feature).

152

Wireless coverage area

Wireless coverage area

Another AP appear on the network

Power adjusted to prevent interference

The AP is powered down

Power increased

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Self-Healing Wireless Network (Load Utilization)



Wireless switch performs load utilization across the switch-managed access points on per radio basis based on AP’s utilization rate.

The APs report bandwidth utilization to the wireless switch regularly. If the bandwidth utilization reaches a configured threshold then the new

client associations are rejected. The new client will be forced to connect to an overlapped neighbor AP with lower utilization.

153

Wireless Switch

Default bandwidth

utilization: 60%

AP-1 AP-2

user4

user4

Utilization rate increased

Reach utilization threshold!!!

Utilization rate for AP-2: 10%

Attempt to connect AP-1

User4 rejectedForce to connect

to AP-2

User4 connect to AP-2

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Enhanced Security Enforcement Rogue AP Management

• An AP is considered to be a rogue if the following conditions are met:– Switch learns about an AP that is not in the database, and the AP has not tried to discover

the switch.– AP is not managed by a peer switch.– The MAC address of the AP is in the local or RADIUS MAC address database with the mode

set to “WS Managed”, but the AP is not actively managed by the wireless switch or a peer switch.

• Using rogue AP management, rogue AP can be acknowledged as a valid AP• Administrator can get better control of the environment through knowing rogue

APs’ information (MAC, SSID, Channel, etc) Complete Security Features

Wireless Wired

• Managed AP MAC list• Wireless Client MAC list• WEP (Static/Dynamic)• WPA Enterprise/Personal• WPA2 Enterprise/Personal

• ACL• 802.1X• DoS Control• Broadcast Storm Control• Port Security• RADIUS/TACACS+



154

Fast Roaming



Roaming allows wireless clients to move from one location to another, seamlessly switching from one Access Point to another and maintaining access to the network.

This feature can be supported within a subnet (Layer 2) or across subnet boundaries.

When a wireless client (fast) roams among different APs on the same SSID, the same security setting and IP address “follows” the client. That means there is no need for IP re-allocation and re-authentication in order to keep the connection alive. Hence, it is seamless.

155

Wireless switch

Mobile user

No re-authenticate when user moves

With Fast Roaming feature, mobile users can move to any place where covered by an overlapped neighbor without the need to re-authenticate

Mobile user want to move

HERE

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Wireless Switch Operation



Steps of wireless switch from attach an AP to user authentication process.1. AP-1 is attached to a switch port and switch will discover AP-1 automatically.2. Network admin can determine whether AP-1 is a rogue or a legal AP.3. Network admin can perform central management of AP, including configuration,

firmware upload, security and RF control.4. All clients are authenticated by the Central Policy Control on the switch.5. Roaming from AP-1 to AP-2 without re-allocating IP and re-authentication to keep

the connection alive.

156

Wireless switch

AP-1 AP-2

PDA User

AP-1 is legal

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Comprehensive Network Management D-Link Unified Access System includes a set of comprehensive

management functions for managing and monitoring the WLAN by using one of the three methods provided• Web-based Management Interface

• Command-Line Interface(CLI)– The CLI is a text-based way to manage and monitor the system. CLI can be accessed

by using a direct serial connection or by using a remote logical connection with Telnet or SSH.

• Simple Network Management Protocol (SNMP)– D-Link Unified Switch uses both standard public MIBs for standard functionality as

well as a number of additional private MIBs for additional functionality supported by the switch.



157

Comprehensive Network Management D-Link Unified Switch can discover, validate, authenticate, or monitor

the following system devices:• Peer unified switches• D-Link access points• Wireless clients• Rogue APs• Rogue wireless clients

The following monitoring task that can be done by the unified switch:• Monitoring wireless global information• Monitoring peer switch status• Monitoring all access points• Monitoring managed access point status• Viewing access point authentication failure status• Monitoring rogue and RF scan access points• Monitoring associated client information• Viewing client authentication failure status• Monitoring and managing ad hoc clients



158

Monitoring Wireless Global Information



Show status and statistics collected periodically about the peer switches and all of the objects associated with it.

159

Monitoring Peer Switch Status



The Peer Switch page provides information about other D-Link Unified Switches in the network.

160

Monitoring All Access Points



Show summary information about managed, failed and rogue access points the switch has discovered or detected.

The font color for the AP listing indicates that the AP is one of the following types:

• Green – Managed AP• Red – Failed AP• Gray – Rogue AP

161

Monitoring Managed Access Points Status



Provide a variety of information about each AP that the switch manages.• Status tab provides configuration and association information about managed APs

and their neighbors.• Statistics tab displays information about the number of packets and bytes

transmitted and received on different interfaces.

162

Viewing Access Point Authentication Failure Status



Show information about APs that failed to establish communication with the D-Link Unified Switch. The AP can fail due to one of the following reasons:

• No Database Entry – The MAC address of the AP is not in the local valid AP database or the external RADIUS server database, so the AP has not been validated.

• Authentication – The authentication password configured in the AP did not match the password configured in the local database or RADIUS database.

163

Monitoring Rogue and RF Scan Access Points



Show information about all APs detected via RF scan, including those reported as Rogues.

164

Monitoring Associated Client Information



Show a variety of information about the wireless clients that are associated with the APs the switches manages.

165

Viewing Client Authentication Failure Status



Shows a list of clients that fail to associate or authenticate with the D-Link Access Point.

166

Monitoring and Managing Ad-Hoc Clients



View and manage wireless clients that are connected to the WLAN through an ad hoc network.

167

Simple Network Monitoring



Capture screen of associated client status.

168

Network Monitoring – WLAN Visualization WLAN visualization Overview

• An optional feature that graphically shows information about the wireless network.

• Display D-Link WLAN Controller Switches, D-Link Access Points, other access points and associated wireless clients.

Benefits of WLAN visualization• Track how and how many managed APs are deployed graphically.• Monitor the wireless network stats via the dynamic updated diagram.• Access visual information, such as how APs are placed, how many clients

are associated to a certain AP, and where rogue APs are located graphically.



169

Network Monitoring – WLAN Visualization



The diagram below shows an example of a floor plan and network with a D-Link Unified Switch that manages two APs. The graph also shows a peer switch and a rogue AP in the network.

170

Medium to Large Scale WLAN Deployment Visual Access Points forms Roaming group

• Geographical overlapped wireless network is made possible with minimum number of physical APs.

Medium to Large Scale of AP Deployment• Four Peer Switches in the same Roaming Group

– Not only can D-Link’s DWS-3000 series supports fast roaming between APs being managed by a particular switch, but can support up to four peer Unified Switches in a roaming group.

– Support up to 192 APs.– Since each switch can support up to 48 APs, this means up to 192 APs can be

supported in a mobility group or domain.



171

Note: The maximum number of managed AP – 192 only applies on APs in the same roaming group. There is no constraint for the number of managed APs at a site if not for roaming. But still, each switch can manage up to 48 APs.

Summary: Wireless Switch Features & Advantages

Using D-Link wireless switch, security can be pre-set and management of certain model of APs can be centralized.

Wireless switch provides automatic channel adjustment and automatic power adjustment feature. Wireless switch automatically adjust channel in the controlled Access Points in an event such as a new AP being removed. It will also adjust RF signal to broadcast far enough to reach wireless clients, but not so far that it interferes with RF signals broadcast by other APs.

Wireless switch performs load balancing across the switch-managed access points on per radio basis based on AP’s utilization rate.

Using rogue AP management feature, the administrator can get better control of the environment through knowing rogue AP’s information (MAC, SSID, Channel, etc).

Summary: Wireless Switch Features and Advantages


172

Summary: Wireless Switch Features & Advantages

Fast Roaming allows wireless clients to move from one location to another, seamlessly switching from one Access Point to another and maintaining access to the network.

Wireless switch provides simple network monitoring and WLAN visualization feature that graphically shows information about the wireless network.

Wireless switch can be used to deploy large scale WLAN infrastructure.

Summary: Wireless Switch Features and Advantages


173

Questions and Answers: Wireless Switch Features and Advantages1. Select features that can be used to avoid network interference. (Choose two)

A. Self-healing wireless networkB. Automatic channel adjustmentC. Fast roamingD. Automatic power adjustment

2. Select contents of pre-set profile configuration packet. (Choose all that apply)A. TCP/IP settingsB. Security settingsC. QoS configurationD. Firmware upgradeE. VLAN ID

3. Select characteristics of load balancing in wireless switch. (Choose all that apply)A. Load balancing is performed across the managed APs on per radio basis.B. Default value for the wireless bandwidth utilization threshold is 70%.C. If the bandwidth utilization reaches a configured threshold, the new client cannot connect to the

network until the bandwidth utilization is lower than the predefined value.D. Load balancing sets thresholds for client associations and AP utilization.E. If the bandwidth utilization reaches a configured threshold, then new client associations are

rejected and enforced to connect to an overlapped neighbor AP with lower utilization.

Questions and Answers: Wireless Switch Features and Advantages


174

Questions and Answers: Wireless Switch Features and Advantages4. Select the characteristics of rogue AP. (Choose all that apply)

A. AP is not managed by the wireless switch.B. AP which failed to connect to wireless switch.C. AP what is not in the local or RADIUS MAC address database but is actively managed by the

wireless switch.D. Switch learns about an AP that is not in the database, and the AP has not tried to discover the

switch.

5. Select the advantage of fast roaming.A. Wireless clients can move to the external network that is out of control from the switchB. Fast roaming can be applied up to 200 APsC. Allow wireless clients to move from one location to another, seamlessly switching from one

Access Point to another and maintaining access to the networkD. All the APs can be in different Roaming Groups

6. Select devices that can be monitored by D-Link wireless switch. (Choose all that apply)A. Peer unified switchesB. D-Link access pointsC. Ethernet switchesD. BridgesE. Wireless clients



175

Questions and Answers: Wireless Switch Features and Advantages7. Select monitoring task that can be done by D-Link wireless switch.

(Choose all that apply)A. Monitoring offline wireless devicesB. Monitoring managed access point statusC. Viewing access point authentication success statusD. Monitoring associated client information



176

Unified Access Point


After this section, you should be capable of expressing:1. Models of D-Link Unified Access Point and the features for all models2. Operation mode supported by the unified access point and the

differences between each mode


177

Unified Access Point Overview Can work in both standalone mode and managed mode Provide migration ability and deployment flexibility

DWL-3500AP DWL-8500AP

• Wireless G access point• Up to 108Mbps wireless speed• PoE support• Two high gain antennas• WMM for QoS• Connect directly to wireless switch

or indirectly through LAN switch

• Wireless AG access point• Up to 108Mbps wireless speed• PoE support• Two high gain antennas• WMM for QoS• Connect directly to wireless switch

or indirect through LAN switch



178

Modes in Unified Access Point



Standalone Mode• Independent access point (Decentralized management)• Suitable for small scope network• Manually set up the configuration, such as:

– SSID– User authentication– Power level– QoS– etc

179

Layer 2 switch

Manual set up configuration



Standalone mode UAP

Standalone mode UAP

Standalone mode UAP

Ethernet LAN

Modes in Unified Access Point



Managed Mode• Managed / controlled by the wireless switch

– Centralized management with all extra benefits from wireless switch

• Automatically received the configuration from wireless switch• Suitable for large scope network

180

Layer 2 switch

Managedmode UAP

Ethernet LAN

Wireless switch

Managedmode UAP

No Manual Configuration for each AP

Centralized AP profile dispatch

Centralized security policy enforcement

Centralized wired/wireless VLAN/QoS/ACL control

Auto Power/Channel adjustment

AP Self healing & Fail-over

Fast Roaming

Instead

Managedmode UAP

Standalone mode UAP

Large network deployment using managed mode UAP

Page is Animated

Summary: Unified Access Point There are two models of unified access point provided by D-Link,

which are DWL-3500AP and DWL-8500AP. These unified access point can be used along with the D-Link

wireless switch. Two operation modes supported for both models of unified access

point: standalone mode and managed mode.

Summary: Unified Access Point


181

Questions and Answers: Unified Access Point1. Select the main difference between DWL-3500AP and DWL-8500AP.

(Choose two)A. DWL-8500AP supports WMM for QoS while DWL-3500AP does notB. DWL-3500AP supports PoE while DWL-8500AP does notC. DWL-3500AP supports 802.11a standard while DWL-8500AP support 802.11a

and 802.11g standardD. DWL-3500AP provides only one antenna while DWL-8500AP provides two

antennas

2. Select characteristics that describe managed mode unified access point. (Choose all that apply)A. “Fat” access point with centralized management from the wireless switch.B. “Thin” access point with centralized management from the wireless switch.C. All AP configurations are automatically received from the wireless switch.D. AP configuration configured all the wireless switch must be applied manually

to the AP.

Questions and Answers: Unified Access Point


182

Market Analysis for D-Link Wireless Switch


After this section, you should be capable of expressing:1. D-Link wireless switch target market2. Product comparison between each model of D-Link wireless switch3. Prospect for D-Link wireless switch product in the market4. Product comparison between D-Link wireless switch and

competitor’s products


183

Highlight of WLAN Market Revenue from sales of WLAN switches and controllers increased

92% year on year, totally $572 million (equivalent to 43% of the WLAN market revenue).

The business market will continue the gradual shift from the traditional stand-alone WLAN architecture to the newer, centralized one (WLAN switches and controllers managing coordinated access points) in 2007.



184

Source: Gartner, 2007

D-Link Wireless Switch Market Target customer – Medium to enterprise business solution

• Entertainment• Education• Manufacture• All business category



185

D-Link Product Comparison

Category Product DWS-3024 DWS-3026

HW Interface Gigabit and 10G Uplink 24GE + 4 Combo SFP for fiber uplink to LAN

24GE + 2 10GE

Redundant Power Supply Yes Yes

L2 Switching Full 4K VLAN Support Yes Yes

L3 Routing Static Routing, VRRP Yes Yes

Wireless Deployment Overlay Deployment Yes Yes

Unified Edge Deployment Yes Yes

# APs supported per Switch Yes Yes

Wireless Switching Fast Layer 3 Roaming Yes Yes

Inter-Switch Layer 3 Roaming Yes Yes

RF Management Dynamic Channel and Power Yes Yes

Self healing around failed APs Yes Yes

Monitoring Topology Visualization Yes Yes

Wireless Security Rogue AP and Client Detection Yes Yes



186

Prospect for D-Link Wireless Switch Product



Competitor Analysis – Gigabit wireless controller / switch

187

P e r f o

r m a

n c

e

Strength

Weakness

• Third party AP support• RF Attack Mitigation

• Weak L2/L3 feature • No Peer Switching• Less no. of VLANs• Lower Switching Capacity

• More Advanced Security - VPN/Firewall• Proprietary features• RF Attack Mitigation• Location tracking

• Thin APs only• Weak L2/L3 feature• Less no. of VLANs• Lower Switching Capacity

• Ring Master Management Tool• Third Party AP Support• RF Attack Mitigation• Individual User Groups

• No embedded Network Visualization (RFMaps)• Lower Switching Capacity

P r i c eP r i c e

3Com WX4400

Current Wireless Controller don’t have Unified Switching capability

Aruba 2400

Cisco 4400

D-Link DWS-3000

3Com Unified Gigabit Switch

• No L3 roaming• Weak L2/L3 feature • No Peer Switching• No embedded• No Network Visualization• Lower Switching Capacity

DES-1228P + WLAN ManagerIs the match <->

Page is Animated

Product Comparison Between Competitor

Category Feature DWS-3026 3Com Unified Switch

Aruba 2400 Cisco 4402

HW Interface Gigabit and 10G Uplink 24GE+2 10GE

24GE 24 10/100 (2 GBIC Slots)

2GE

Redundant Power Supply Yes No No Yes

L2 Switching Full 4K VLAN Support Yes No No No

L3 Routing Static Routing VRRP Yes No Yes No

Wireless Deployment

Overlay Deployment Yes No Yes Yes

Unified Edge Deployment Yes Yes No No

#APs supported per switch 48 24 48 12/25/50/100

Wireless Switching

Fast Layer 3 Roaming Yes No Yes Yes

Inter-Switch Layer 3 Roaming Yes No Yes Yes

RF Management

Dynamic Channel and Power Yes Yes Yes Yes

Self-Healing around failed APs Yes Yes Yes Yes

Monitoring Topology Visualization Yes No Yes Yes

Wireless Security

Rogue AP and Client Detection Yes Yes Yes Yes



188Wireless Controllers* Different number of APs supported based on buying upgrade licenses

Summary: Market Analysis for D-Link Wireless Switch The business market will continue the gradual shift from the

traditional stand-alone WLAN architecture to the one (WLAN switches and controllers managing coordinated access points) in 2007.

D-Link target market for its wireless switch products is mainly for medium to enterprise business solution for any fields.

D-Link wireless switch provides many advantages and features that are not supported in competitor’s products.

Summary: Market Analysis for D-Link Wireless Switch


189

Questions and Answers: Market Analysis for D-Link Wireless Switch1. Select target markets for D-Link Unified Access System. (Choose

two)A. SOHOB. ISP/WISPC. UniversityD. Internet Cafe

2. Select the advantages of D-Link wireless switch over the other competitors. (Choose two)A. D-Link wireless switch provides 24 Gigabit Ethernet ports and two 10GE

uplink ports which other competitors provide only 24 Gigabit Ethernet without uplink ports.

B. D-Link wireless switch is so much cheaper than other competitors’ products.

C. D-Link wireless switch provides lifetime warranty while other competitors’ products must pay extra fee to get lifetime warranty.

D. D-Link wireless switch provides full 4K VLAN support while other competitors do not.

Questions and Answers: Market Analysis for D-Link Wireless Switch


190

Wireless Switch Deployment Application


After this section, you should be capable of expressing:1. Suitable implementation for different scenarios and requirement2. Basic topology for deploying network infrastructure using wireless

switch product series


191

Wireless Switch Deployment in a School



In this project, three wireless switches were used to connect the entire campus (Class rooms, labs, teacher room, library). All APs distributed to all campus are managed centrally at the wireless switch. Thus, it makes network management and monitoring easier.

192

Server RoomToilet

Classroom-1

Classroom-2

Classroom-3

Classroom-4

Classroom-5

Classroom-6Classroom-7

Classroom-8

Library

Labs

Toilet

Teacher’s room

Administrator Office

Classroom-9

Classroom-10

Classroom-11

Main Hall

Wireless Switch Deployment in a Hotel



A hotel wants to build wireless hotspot area to enhance customer satisfaction. The network must run reliably with high speed Internet connection. It has to be easier to maintain as no staff knows about wireless technology.

D-Link wireless switch provides the solution. It provides control, security and management features that are key requirements to allow the hotel staff to manage AP better and easier.

193

11th floor

12th floor

2 Wireless switch are each placed at 11th floor and 12th floor. furthermore, 95 wireless AP managed by the wireless switch are distributed to all floors over the hotel. 5 AP for each floor, placed at common area.

……

….

……

….

19th floor

1st floor

Summary: Wireless Switch Deployment Application

D-Link wireless switch can be implemented widely depending on the condition and requirement from the customer, mainly on medium to large business environment.

For example, implementation in a hotel, university, bank, etc.



194

Success Stories Lankwitzer Premium Coating, Germany American School of Dubai, Middle East Concorde Hotel, Malaysia

Success Stories


195

Lankwitzer Counts on Innovative Wireless Switching Solution

Success Stories


Lankwitzer wants to connect its new building wirelessly for the transmission of data and voice, especially wireless telecommunication through an internal Voice over IP-telephone system.

D-Link Germany in cooperation with the Multicomp Systemhaus helped to implement a wireless network infrastructure, which offers a maximum of flexibility and bandwidth as well as superior security and management functions using wireless switch solution.

List of devices used:• D-Link wireless switch, DWS-3024• 24 D-Link unified access point, DWL-8500AP• xStack switch, unmanaged switch, firewall

196

Wireless Switch Solution for Mobile Learning Space in ASD

Success Stories


American School of Dubai (ASD) wants to create a continuous (mobile) learning space in the campus to enable the students access the network resources wirelessly.

D-Link Middle East successfully implement the project which provide secured network infrastructure with seamless wireless coverage area and centralized network management.

List of devices used:• Two D-Link wireless switch, DWS-3026• Two unified AP, DWL-8500AP• 61 unified AP, DWL-3500AP• Layer 3 switch, DES-3828P

197

Concorde Hotel Provides Wireless Hotspot Using Unified Solution

Success Stories


Management of Concorde Hotel in Kuala Lumpur wants to provide wireless hotspot area within the hotel to enhance customer satisfaction. They want to manage the entire network through an easy, unified solution.

D-Link Malaysia provides wireless access through minor customizations at a reasonable cost.

List of devices used:• Two units of D-Link wireless switch, DWS-3024• 95 units of unified access points, DWL-3500AP (five units for common area in each

floor)

198

[wireless] version 1.2. course outline introduction to wireless customer needs and the solution ...

Documents

wireless dcs wireless

wireless adapter

wireless version

wireless network introduction

types of wireless network

history of wireless

evolution of wireless

wireless basic component