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Introduction

Resource Sharing

Networking Methods Local area network (LAN)

Hardware Required for Networking

Networking Topology

Scope in Networking

Need for Networking

History

Jobs in Networking

Application of Networking

Wide area network (WAN) Metropolitan area network (MAN) Wireless network (WLAN,WWAN)

Reliability Financial Benefit Better Communication Medium

Advantage and Disadvantage of Networking

Networking is the practice of linkingtwo or more computing devices

together for the purpose of sharing data .

In 1967 APRA proposed an idea to develop a small network of connected computer called APRANET .

In this network each computer was connected to a specialized computer called an Interface Message Processor (IMP) .

In 1969 APRANET was implemented .four computer at different geological location through the IMPS.

In 1980 U.S. NSF started exploring ways to enable access of their supercomputer to researchers at various college and Uni.

The NSF developed a network called the National Science Foundation Network (NSFNET) .

In 1990 Tim Berners-Lee Created the World Wide Web (WWW)

Resource Sharing ,aim is to make data ,program available to anyone on the network.

Reliability , file can be replicated on two or three machines if one them is unavailable the other can be used. Financial Benefit, networking of PC is batter rather then centralized large computer . Better Communication Medium, it is possible to transfer instantly any information to any other destination .

Network cards : such as this one can transmit and receive data at high rates over various types of network cables . This card is a 'Combo' card which supports three cabling standards.

Network adapter : interfaces a computer board with the network medium.

Router : links two or more networks.

Hub : multi-port repeater . Switches :bridging technology to forward traffic between ports.

Modem : A modem is a computer peripheral that allows you to connect and communicate with other computer via telephone lines . There are four principal media for telecommunications

Coaxial Cable

Twisted Pair Cable

Optical Fiber

Wireless

WAN Devices

One way to categorize computer networks is by their geographic scope

A local area network is a network that spans a relatively small space and provides services to a small number of people.

The first LAN was invented by a Law Doctor in 1978 .

A wide area network is a network where a wide variety of resources are deployed across a large domestic area or internationally

Example :- Internet

A metropolitan network is a network that is too large for even the largest of LAN's but is not on the scale of a WAN .

Example :- City

A wireless network is basically the same as a LAN or a WAN but there are no wires between hosts and servers .

The network topology defines the way in which computers, printers, and other devices are connected, physically and logically . Bus

Star

Tree (hierarchical)

Ring

Mesh

Fully connected Partially connected

E- mail Service

Locating sites using search engines

Finding People on the Net

Chat

Video Conferencing

E-Commerce

Shopping on Web

Networking has very broad scope as a career path . Network Administrator . Network (Systems) Engineer . Network (Service) Technician . Network Programmer/Analyst . Network/Information Systems

Manager . CIOs were asked: Which of the following technical skill sets are most in demand within your IT department? (All the execs worked for companies with more than 100 employees; they were allowed to select more than one skill. The survey was conducted in September 2008.)

o Network administration (LAN, WAN): 70% o Windows administration: 69% o Desktop support: 69% o Database management: 58% o Wireless network management: 47% o Telecommunications support: 44% o Web development/Website design: 42%

o Business intelligence/reporting services: 33% o .NET development: 22% o Linux/Unix administration: 20% o Java development: 17% o XML development: 17% These are good days to be a Network

Administrator or a System Engineer specialist.

Company Pay in LPA

Google 13.0

Microsoft 9.0

CISCO 5.0

IBM 2.5

Infosys 3

HCL 3.3

2007-2008 company packages Starting Averag

eTop

$ 44,790

$ 65,725

$ 76,190

In Foreign

Median Salary by Job in Network Administration/IT ( In India)

By Experience By Employer Type By City

( In United States ) By Experience By Employer Type By

Job

Speed. Networks provide a very rapid method for sharing and transferring files.

Centralized Software Management software can be loaded on one computer .

Electronic Mail. . E-mail aids in personal and professional communication .

Workgroup Computing software allows many users to work on a document or project concurrently

Requires Administrative Time. Proper maintenance of a network .

File Server May Fail when the files server "goes down ," the entire network may come to a halt .

Cables May Break broken cable can stop the entire network .

Networking can be a waiting game where you have to wait it out patiently for the right opportunity or the right contact to come available .

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