ccna dis1 - chapter 7 - wireless technology [compatibility mode]

8/3/2019 CCNA Dis1 - Chapter 7 - Wireless Technology [Compatibility Mode]

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Chapter 7 Wireless Tecnology

CCNA Discovery 4.0

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Objectives

Describe wireless technologies. Describe the various components and structure of a

WLAN

Describe wireless LAN security issues and mitigation

strategies Configure an integrated wireless access point and a

wireless client .

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Wireless Technology

Wireless Technology and DevicesDescribe the various wireless technologies and the devices that use them



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Wireless Technology

Wireless Technology and DevicesInfrare

Infrared (IR) is relatively low energy and cannot penetrate through walls orother obstacles

It is commonly used to connect and move data between devices such as

Personal Digital Assistants (PDAs) and PCs A specialized communication port known as an Infrared Direct Access (IrDA)port uses IR to exchange information between devices

R only allows a one-to-one type of connection. It is generally used for short-range, line-of-sight, communications IR is also used for remote control devices, wireless mice, and wireless

keyboards



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Wireless Technology

Wireless Technology and DevicesRadio Frequency (RF)



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Wireless Technology

Benefits and Limitations of Wireless Technology



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Wireless Technology

Types of Wireless Networks and Their Boundaries



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Wireless Technology

Wireless LAN Standards



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Wireless Technology

Wireless LAN Components



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Wireless Technology

Wireless LAN ComponentsAntennas

Used on APs and Wireless bridges Increases the output signal

strength from a wireless device

Receives wireless signalsfrom other devices such as STAs

Increase in signal strengthfrom an antenna is known as the gain

Higher gains usually translate

into increased transmission distances



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Wireless Technology

WLANS and SSID Identify and describe various wireless modes and the importance of the

SSID IBSS ad hoc

BSS - infrastructure



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Wireless Technology

WLANS and SSID Describe how wireless channels are used CSMA/CA: Describe how wireless channels avoid collisions



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Wireless Technology

Configuring The Access Point



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Wireless Technology

Configuring the Wireless Clients



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Security Considerations on A Wireless LAN

Why people Attack WLANs Describe why and how people attack wireless networks



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Limiting Access to a WLAN



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Authentication on a WLANOpen Authentication



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Authentication on a WLANPre-shared keys (PSK)



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Authentication on a WLANExtensible Authentication Protocol (EAP)



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Authentication on a WLANExample:



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Encryption on a WLAN

Wired Equivalency Protocol (WEP)

WEP uses pre-configured keys to encrypt and decrypt data A WEP key is entered as a string of numbers and letters and is generally

64 bits or 128 bits long.



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Encryption on a WLAN

Wi-fi Protected Access (WPA)

WPA generates new, dynamic keys each time a client establishes aconnection with the AP



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Traffic Filtering on a WLAN

Describe traffic filtering and its purpose



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Planning the WLAN

Plan for a wireless LAN implementation



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Installing and Securing the AP



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Backing-up and Restoring Configuration Files

Describe options for backing-up and restoring AP configurations



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Update Firmware



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Summary

Wireless technologies use electromagnetic radiation in theform of radio signals to carry information between devices.

Ease and convenience of connecting devices wirelesslycreates security concerns that need to be addressed.

Before installing wireless devices, an installation planshould be created which includes strategies for layout andsecurity.



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ccna dis1 - chapter 7 - wireless technology [compatibility mode]

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