02nd September 2014 

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Happy New Year 2014!
Happy 2012 Everybody
iMod for Home Take II
iMod - Versatility for Home and Portable
Personal Audio Journey - Part III
Anthony Gallo Reference 3.1
Relentless Pursuit of Excellence.. Madness Part Deux!

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Table of Contents
The OSI Reference Model
Baud and Bits & Transmission Media
Moving on to the Ethernet & Conclusion


Basics of Networking - Part 1
Page 1 of 4
Author: kan
Date of review: 14-December-2000
Type Of Review: Networking

The term Local Area Networking, or LAN for short, refers to privately owned networks within a single building or area of up to a few square kilometers in size. LAN should be a very familiar term by now, especially for Quakers who engross themselves in LAN parties every night.

So why the need for LAN? Before the time when we have LAN games, the main purpose of networking computers is for resource sharing. The goal is to make programs, equipment and data available to anyone on the network without regard to the physical location of the resource. This helps to save money as data can be kept on the file server machines, while the users can access them from dumb terminals or less powerful computers.

An example of a LAN network in a campus.

LANs are restricted in size, unlike WANs (Wide Area Networks) which can span over huge geographical boundaries. A small LAN network can be as simple as just 2 computers connected by 2 NICs (Network Interface Card) and a transmission medium between them. Information is then transmitted via the medium by varying some physical property such as voltage or current. By representing the value of this voltage or current as a single-valued function of time, f(t), we can model the behavior of the signal mathematically.

A point to note is that we measure bandwidth in Mbps, or Megabit/sec. Unlike hard drive data transfers which is measured in MB/s, or Megabytes/sec, a megabit is 1,000,000 bits and not 1,048,576 bits. This is a widely known confusion where some people seem to pose some form of handicap over these terms.

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