networking basics and cisco
DESCRIPTION
This presentation contains Networking Basics Concepts and basic topologies of Computer Networking discussed. Also gives information about Cisco History.TRANSCRIPT
Networking Basics &
Cisco
Shoaib Iqbal
IT Engineer
Date: 10-02-2014
Networking Basics
Network
Connectivity of two or more than two devices so that they can communicate with each other.
Network = Connectivity + Communication
Network = Hardware + Software
Local Area Network (LAN) A high speed network that covers a relatively small geographic
area, contained within a single building or campus.
Wide Area Network (WAN) A network that spans large geographical locations, usually to
interconnect multiple LANs.
Metropolitan Area Network (MAN) A network that spans several LANs across a city-wide
geographic area.
Network Types
Five Components of Communication
• Sender• Receiver• Medium• Protocol• Message
Rules that govern the method by which devices share data and services.
Protocol
Types of Communication
Topology
Mesh Topology
Star Topology
Bus Topology
Ring Topology
Hybrid Topology
internet is two or more networks that can communicate
with each other.
Internet is collaboration of more than hundreds of
thousands of interconnected networks.
Internet
Established in 1947, the International Standards Organization (ISO) is a multinational body dedicated to worldwide agreement on international standards.
In 1978, Open System Interconnection (OSI) model was introduced.
OSI Model
ISO is the organisation. OSI is the model.
OSI Model
7. Application
6. Presentation
5. Session
4. Transport
3. Network
2. Data Link
1. Physical
OSI Model-Division of Layers
7. Application
6. Presentation
5. Session
4. Transport
3. Network
2. Data Link
1. Physical
Lower Layers
Middle Layers
Upper Layers
Each layer deals with one aspect of networkingLayer 1 deals with the communication media
Each layer communicates with the adjacent layersIn both directionsEx: Network layer communicates with:
Transport layerData Link layer
Each layer formats the data packetEx: Adds or deletes addresses
The Function of a Layer
OSI Model
A message begins at the top application layer and moves down the OSI layers to the bottom physical layer.
As the message descends, each successive OSI model layer adds a header to it.
A header is layer-specific information that basically explains what functions the layer carried out.
Conversely, at the receiving end, headers are striped from the message as it travels up the corresponding layers.
OSI in Action
OSI Layers Description
Hubs
Switches
Routers
IP Phones
Network Security Products
Commonly Used Network Devices
Cisco SystemsHPHuaweiZTEJuniper NetworksD-LinkTelco SystemsAlcatel-LucentArista NetworksMellanox
Network Devices Manufacturers
Cisco Systems
Cisco is an American multinational corporation headquartered in San Jose, California, that designs, manufactures, and sells networking equipment.
Cisco Systems was founded in December 1984 by two members of Stanford University computer support staff: Leonard Bosack who was in charge of the computer science department's computers, and Sandy Lerner, who managed the Graduate School of Business' computers.
The name "Cisco" was derived from the city name, San Francisco
The logo is intended to depict the two towers of the Golden Gate Bridge.
Company Overview
Cisco Systems Logo Concept
Cisco’s logo is depicting two towers of Golden Gate Bridge
Golden Gate Bridge
Cisco Systems, Inc. is the worldwide leader in networking for the Internet.
Today, networks are an essential part of business, education, government and home communications.
Cisco Internet Protocol-based (IP) networking solutions are the foundation of these networks.
Company Overview
In 1984, Cisco’s first product which consisted of exact replicas of Stanford's "Blue Box" router and a stolen copy of the University's multiple potocol router software.
Between 1992 and 1994, Cisco acquired several companies in Ethernet switching, such as Kalpana, Grand Junction, and most notably, Mario Mazzola's Crescendo Communications which together formed the Catalyst business unit.
Company Overview cont’d
Routers and switches
Security and surveillance
Voice and conferencing
Wireless
Network storage systems
Cisco’s Products List
https://en.wikipedia.org/wiki/Ciscohttp://www.cisco.com/cisco/web/solutions/sma
ll_business/resource_center/articles/connect_employees_and_offices/networking_basics/
References
ODSI11 St John's Road Stourbridge West Midlands DY8 1EJ
Phone: 0203 005 9500
Email: [email protected]
About ODSI
UK Office
Web: www.odsi.co.uk
Cisco Products Dealer
Thank You