What is the main role of a router in a WAN?

WAN routers don't have much use, I think the most useful thing is to serve as a springboard, if the IP resources are enough, each computer can be assigned an IP address, then there will be no router at all.

The role of the router itself is to allow N computers to share a public IP address.

First, network interconnection, routers support a variety of LAN and WAN interfaces, mainly used to interconnect LAN and WAN, to achieve different networks to communicate with each other;

second, data processing, which provides functions including packet filtering, packing**, priority, multiplexing, encryption, compression, and firewall;

Third, network management, routers provide functions including configuration management, performance management, fault tolerance management, and traffic control.

A WAN generally consists of a host (resource subnet) and a communication subnet.

A wide area network is also known as a long-range network. It usually spans a large physical area, covering a range from tens of kilometers to thousands of kilometers, it can connect multiple cities or countries, or across several continents and can provide long-distance communication, forming an international long-distance network.

The coverage area is wider than that of both LAN and metro networks. The communication subnet of the WAN mainly uses packet switching technology. The communication subnet of the wide area network can use the public packet switched network, the satellite communication network and the wireless packet switching network, which will interconnect the local area network or computer system distributed in different grandchild areas to achieve the purpose of resource sharing.

For example, the Internet is the largest wide area network in the world.

The WAN is composed of many switches, which are connected by point-to-point lines, and almost all point-to-point communication methods can be used to establish a wide area network, including leased lines, fiber optics, microwaves, and satellite channels. A WAN switch is actually a computer with processors and input and output devices for sending and receiving data packets.

WideArea Network (WAN), also known as Remote Computer Network (RCN), has the largest range of functions, generally ranging from tens of kilometers to tens of thousands of kilometers. A national or international network is a wide area network. Within a WAN, the transmission device and transmission medium used for communication may be provided by the telecommunications sector.

At present, the world's largest information network, the Internet, has covered more than 180 countries, including China.

1. Wide Area Network (English: Wide Area Network, abbreviated as WAN), also known as Wide Area Network, Extranet, Public Network. It is a remote network that connects computer communication in different regions, either a local area network or a metropolitan area network.

It can connect multiple regions, cities, cities and countries, or across several continents and provide long-distance communications, forming an international long-distance network. A WAN is not the same as the Internet.

2. When the distance connected to the hub is exceeded in an area, it must be connected through a router, which is called a wide area network. If there are branches in the north, middle, and south, or even overseas branches, these branches are connected in the form of private lines, which is called "WAN".

3. The sending medium of the WAN is mainly the use of ** lines or optical fibers, and the ISP operators will connect the enterprises to each other, and these lines are the lines buried under the road in advance by the ISP operators, because the project is huge, the maintenance is not easy, and the bandwidth can be guaranteed, so it will be more expensive in cost.

4. The Internet is generally referred to as a kind of public WAN, and the cost of the public WAN will be lower, which is a cheaper online environment, but compared with the WAN, there is no way to manage the bandwidth, and the bandwidth of any section cannot be guaranteed by the public network system.

1. Wide Area Network (English: Wide Area Network, abbreviated as WAN), also known as Wide Area Network, Extranet, Public Network. It is a remote network that connects computer communication in different regions, either a local area network or a metropolitan area network.

It usually spans a large physical range, covering a range of tens of kilometers to thousands of kilometers, it can connect multiple regions, cities and countries, or across several halls and continents and can provide long-distance communication, forming an international long-distance network. A WAN is not the same as the Internet.

2. When the distance between the hub and the hub is exceeded in an area, it must be connected through a router, which is called a wide area network. If there are branches in the north, middle, and south, or even overseas branches, these branches are connected in the form of private lines, which is called "WAN".

3. The sending medium of the WAN is mainly the use of ** lines or optical fibers, which are connected between enterprises by ISP operators, and these lines are the lines buried under the road in advance by ISP operators, because the project is huge, maintenance is not easy, and the bandwidth can be guaranteed, so it will be more expensive in cost.

4. The Internet is generally referred to as a kind of public WAN, and the cost of the public WAN will be lower, which is a cheaper online environment, but compared with the WAN, there is no way to manage the bandwidth, and the public network system can not guarantee the bandwidth of any disadvantages.

Features: 1. The geographical area covered is large;

2. Low transmission rate;

3. The network topology is complex;

4. Connect to the public network.

Wide area networks, also known as long-range networks, usually span a large physical range, and the search and coverage range ranges from tens of kilometers to thousands of kilometers. It can connect multiple cities or countries, or span several continents, and can provide long-distance communications, forming an international long-range network.

Routers can not only realize the connection between LANs, but also the more important application is the interconnection between LAN and WAN parallel network, and between WAN and WAN. The interface between the router and the WAN is called the WAN interface. There are several types of WAN interfaces that are commonly found in routers.

1) RJ-45 port.

2) AUI port.

3) High-speed synchronous serial port.

4) Asynchronous serial port.

5）isdn

BRI port.

A WAN is a network that connects multiple computers to communicate with each other and share resources within a large geographical area. Compared with LAN, the transmission speed of WAN is comparatively much slower. There are several types of road connection forms, such as ** line and special line.

In people's minds, it is always believed that the difference between WAN and LAN is that WAN is a network that realizes communication between geographically distant places through ** lines. However, with the development of communication technology and network technology, this definition is no longer accurate, and accordingly, people will gradually dilute the boundary between WAN and LAN.