A computer network connects two or more computers to enable communication and sharing of resources. It provides advantages like resource sharing, reliability, cost savings, and powerful communication. However, it also lacks independence, requires an efficient handler, has an expensive setup cost, and poses security difficulties. Key requirements to establish a network include computers, cables, network interface cards, switches, and operating systems. Common types of networks are local area networks, wide area networks, metropolitan area networks, campus networks, enterprise private networks, backbone networks, global area networks, and the Internet.

1. Saurabh gupta

2. Defination
 A computer network is defined as the
interconnection of two or more
computers. It is done to enable the
computers to communicate and share
available resources.
example-Internet

3. Advantages:
 Resource sharing.
 For providing high reliability
 To save money.
 It can provide a powerful communication
medium.

4. Disadvantages
 It lacks independence.
 It requires an efficient handler.
 It requires an expensive set-up
 security difficulties.

5. Requirement
 Two or more computers
 Cables as links between the computers
 A network interfacing card(NIC) on each
computer
 Switches
 Software called operating system(OS)

6. Type of computer network
There are many types of networks, including:
 Local Area Networks (LAN)
 Wide Area Networks (WAN)
 Metropolitan Area Networks (MAN)
 Campus Networks
 Enterprise Private Networks
 Backbone Networks (BBN)
 Global Area Networks (GAN)
 The Internet