What are the interconnected devices at the network layer?

The interconnection device at the network layer is the "router". A router is a hardware device that connects two or more networks. It acts as a gateway between networks. It is a dedicated intelligent network device that reads the address in each data packet and then decides how to transmit it. During operation, the router only accepts information transferred from the source station or other related routers. It is an interconnection device based on the network layer.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

In the computer network architecture, the interconnection device belonging to the network layer is the "router".

A router is a hardware device that connects two or more networks. It acts as a gateway between networks. It is a dedicated intelligent network that reads the address in each data packet and then decides how to transmit it. equipment. It can understand different protocols, such as the Ethernet protocol used by a local area network and the TCP/IP protocol used by the Internet.

In this way, the router can analyze the destination addresses of data packets from various types of networks, convert the addresses of non-TCP/IP networks into TCP/IP addresses, or vice versa; and then based on the selected routing algorithm Send each data packet to the designated location according to the best route. So the router can connect non-TCP/IP networks to the Internet.

A router can also be called a gateway device. The router is the network layer relay and third layer relay tasks completed in OSI/RM. It stores and forwards data packets between different networks. Its main purpose is to separate the networks in different logics. Data transmitted from one subnet to another can be processed through the routing function of the router.

In network communications, routers have the function of determining network addresses and selecting IP paths. They can build flexible link systems in multiple network environments and use different data grouping and media access methods to connect various subnets. Make a link. During operation, the router only accepts information transferred from the origin station or other related routers. It is an interconnection 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 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 in data link layers.

But the router is different. It breaks this limitation and can connect any two different networks. However, one principle must be followed between these two different networks, which is to use the same network layer protocol. In this way to be connected to the router. Routing technology is simply a technology that forwards and exchanges numerous information on the network. Specifically, it transmits information from the source address to the destination address through the Internet.

Routing technology has also achieved good development and progress in recent years, especially the emergence of fifth-generation routers, which meets people's comprehensive applications of data, voice and images, and is gradually chosen by most home networks. and is widely used.

In addition, in the past few years, our country's routing technology has become more and more mature, and it has also been combined with contemporary intelligent technology, allowing people to experience fast and efficient use of routing technology. effect, thereby promoting and promoting the development of the Internet and network technology.

The router is the main node device of the Internet. Routers decide the forwarding of data through routing. The forwarding strategy is called routing, which is where the name of the router comes from. As the hub of interconnection between different networks, the router system forms the main body of the Internet, an international Internet based on TCP/IP. It can also be said that routers form 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, router technology has always been at the core in campus networks, regional networks, and even the entire Internet research field, and its development history and direction have become a microcosm of the entire Internet research. At a time when my country's network infrastructure and information construction are in the ascendant, we will discuss the role, status and development direction of routers in interconnection networks, as well as the domestic network technology research and network construction, as well as clarify the relationship between routers and network interconnection in the network market. Various specious concepts have important significance.

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