What is Computer Network?

A computer network is a set of devices connected through links. A node can be a computer, printer, or any other device capable of sending or receiving data. The links connecting the nodes are known as communication channels.

A Computer Network uses distributed processing, in which tasks are divided among several computers. Instead of a single computer handling an entire task, each separate computer handles a subset. This aligns with the correct understanding of distributed processing, where multiple computers work on different parts of a task.

Advantages of Distributed Processing

• Security: It provides limited interaction that a user can have with the entire system.
  Example: A bank allows users to access their own accounts through an ATM without allowing them to access the bank's entire database.

• Faster Problem Solving: Multiple computers can solve a problem faster than a single machine working alone.

• Security Through Redundancy: Multiple computers running the same program simultaneously can provide security through redundancy.
  Example: If four computers run the same program and one computer experiences a hardware error, the other computers can override it.