What is backbone network

Internet backbone Internet  backbone network

Several computers are connected , You can see each other's files , It's called LAN , Computers all over the city are connected , It's the metropolitan area network , The network connecting cities is called backbone network . These backbone networks are Internet approved by the state and can be directly connected with foreign countries . Other with access function ISP If you want to go abroad, you have to go through these backbone networks .

form “ backbone network ” It is often used to describe large network structures , Describe the network structure , The main thing is to see the network topology , Not the specific transmission mode or protocol used . Backbone networks are generally wide area networks : The range of action is tens to thousands of kilometers .

The backbone network consists of multiple transmission modes , A combination of multiple protocols .

Our four backbone networks are CHINANET,CERNET,CSTNET,CHINAGBN