Article directory
1. Collation of knowledge points
Some important features of the 21st century are digitization, networking and informatization . It is an information age with the network as the core .
Three types of networks that everyone is familiar with: telecommunication networks, cable TV networks, and computer networks.
Telecommunications network: provide users with telephone, telegraph and fax services.
Cable television network: Delivers various television programs to subscribers.
Computer networking: Enables users to transfer data files between computers.
One of the fastest growing is the computer network.
Internet : This book is mainly translated as the Internet.
For computer networks that are only interconnected in a local area, it can only be called the Internet, not the Internet.
The reason why the Internet can provide users with many services is due to two important basic characteristics of the Internet: connectivity and sharing
Connectivity : No matter how far apart the Internet users are, they can exchange various information conveniently, as if these user terminals are connected to each other. But different from using traditional telecommunication networks, due to the virtual nature of the Internet, when you receive an email, you may not know exactly who sent you the email.
Sharing : refers to resource sharing, including information sharing, software sharing, and hardware sharing. For example server.