The Concept and Principle of The Router

The router can also be called a gateway device. The router is the network layer relay and the third layer relay task completed in OSI/RM. It stores and packet forwards the data packets between different networks, and it mainly separates the networks in different logics. The data is transmitted from one subnet to another, and can be processed by the router's routing function. In network communication, the router has the function of judging the network address and selecting the IP path. It can construct a flexible link system in multiple network environments, and link each subnet through different data packets and media access methods. In operation, the router only accepts the information transmitted by the source station or other related routers. It is an interconnected device based on the network layer.


Routers are usually located at the network layer, so routing technology is also a technology related to the network layer. Compared with the early bridges, routers have many changes and differences. Generally speaking, the limitations of a network bridge are relatively large. It can only connect networks with the same or similar data link layers, and cannot connect networks with large differences between the data link layers. But the router is different. It breaks this limitation and can connect any two different networks. However, there is a principle that must be observed between these two different networks, which is to use the same network layer protocol, so that they can be connected by the router. In simple terms, routing technology is a technology that forwards and exchanges numerous information on the network. Specifically, it transfers information from a source address to a destination address through the Internet. Routing technology has also made good development and progress in the past few years, especially the emergence of the fifth-generation router, which satisfies people's comprehensive application of data, voice and image, and is gradually selected and widely used by most home networks. In addition, in the past few years, China's routing technology has become more and more mature, and at the same time it has combined with contemporary intelligent technology, so that people can experience fast and rapid results in the process of using routing technology, thereby promoting and promoting The development of the Internet and network technology.
 
The router is the main node device of the Internet. The router determines the forwarding of data through routing. The forwarding strategy is called routing, which is the origin of the router name. As a hub for interconnecting different networks, the router system constitutes the main context of the Internet based on TCP/IP. It can also be said that routers constitute the backbone 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 campus networks, regional networks, and even the entire Internet research field, router technology has always been at the core. Its development process and direction have become a microcosm of the entire Internet research. At the time when China’s network infrastructure and information construction is in the ascendant, discuss the role, position and development direction of routers in the interconnection network, for domestic network technology research, network construction, and clarify the importance of routers and network interconnections in the network market The various specious concepts of, have important meanings.