[Add one after another] basic concepts of computer networks

1. node.

It refers to a computer or computer network device, that is, the basic unit of the entire computer network.

 

2. Computer Network

General Definition: a collection of computers that use certain communication protocols to communicate with each other through transmission media, network devices, and software.

Professional definition: A computer network is a communication line and communication equipment that are distributed in different locations through a certain method of connection (or relatively the same location) multiple Computer Systems with independent functions (including independent computers and networks) are connected to each other, and data communication is performed with the support of network software to achieve resource sharing.

The computer type of nodes is not important. What is important is that these interconnected devices have a common language, that is, network communication protocols. communication protocols are a series of rules and conventions that control the exchange of information between devices in the network.

 

3. three essential elements of modern computer networks

At least two computers.

Communication devices and line media

Network Software, communication protocol, and network operating system)