What is Network? Briefly Described

What is Network ? Briefly Described.

“A NETWORK is a set of devices (Nodes) connected by Communication Links”

• Node: Can be a Computer, Printer or any other device capable of sending or receiving
  The links connecting Nodes are called COMMUNICATION CHANNELS
  Networks- Why we need them?

Networks- Why we need them?

It is often impractical for devices to be directly connected for two major reasons:

• The devices are very far apart. They are expensive to connect just two devices with one in Lahore and other in Islamabad
• Large set of devices would need impractical number of connections e .g. Telephone Lines in the world and all the computers owned by a single organization

Solution to the Problem Networks

• Solution is to connect all devices to a central system known as a NETWORK in which all terminals or computers share the links.
• Two Main Classifications of the Networks

1. LANS
2. WANS

DISTRIBUTED PROCESSING

• Instead of a single large machine being responsible for all aspects of a process , each separate computer handles a subset of the task

Example – Project Given as a part of the Course

Example – Office Work