A router can also be called a gateway device.Router is the network layer relay and the third layer relay tasks completed in OSI/RM, and it stores and forwards packets between different networks, which is mainly to separate networks in different logic.Data is transferred from one subnet to another and can be processed by the router's routing capabilities.In the network communication, the router has the function of judging the network address and choosing the IP path. It can build a flexible link system in multiple network environments and link each subnet through different data grouping and media access mode.The router only accepts the information transmitted by the source station or other related routers during operation. It is an interconnection device based on the network layer.
Routers are usually located in the network layer, so routing technology is also a technology related to the network layer. Routers have a lot of changes and differences compared with the early bridge.Generally speaking, the bridge has great limitations. It can only connect the same or similar network in the data link layer, and cannot connect the network with great difference between the data link layer.But the router is different, it breaks this limitation, can connect any two different networks, but these two different networks must abide by a principle, is to use the same network layer protocol, so that can be connected by the router.Routing technology is simply a technology to forward and exchange a large number of information on the network. Specifically, it is to transfer information from the source address to the destination address through the Internet.Routing technology has also made good development and progress in recent years, especially the emergence of the fifth generation router, which meets people's comprehensive application of data, voice and image, and is gradually selected by most home networks and widely used.In addition, in recent years, China's routing technology is becoming more and more mature, but also combined with the contemporary intelligent technology, making people in the process of using routing technology can feel fast, fast effect, so as to promote and promote the development of the Internet and network technology.
The router is the main node equipment of the Internet.The router determines the forwarding of data through routing.The forwarding strategy is called routing, which is where the router's name comes from.As the hub between different networks, the router system constitutes the main vein of the international network Internet based on TCP/IP. It can also be said that the router constitutes the skeleton of the Internet.Its processing speed is one of the main bottlenecks of network communication, and its reliability directly affects the quality of network interconnection.Therefore, in the field of campus network, regional network, and even the whole Internet research, router technology has always been in the core position, its development course and direction, become a miniature of the whole Internet research.In the current network infrastructure and information construction in our country, to explore the role of routers in interconnection network, status and development direction of research on the domestic network technology, network construction, and specific network on the market for routers and network interconnection of various is rather than a concept, has important meaning.
