What is network?
In everyday life we hear the word network. A network is a system where everyone can share information or work together. For example, let's say the postal department distributes letters all over the country. The Postal Department has a nationwide network for Edge. They have different offices in different places in this network, there are some rules. The whole postal department is running according to those rules. Here every part of their network is working together. If there is no such network, they will not be able to work.
source: https://www.learntechbd.com/2019/09/blog-post.html
Such networks can also be used for computers. When a computer is connected to one or more computers and exchanges information, that computer is said to be part of the network. A minimum of two computers are required to network. These computers are connected to each other through special devices for exchanging information. Besides, the rules of how one computer will communicate with another computer, what will be their language, etc. are specified in advance.