Also known as public network. It is a long-distance network connecting computers in local area networks or metropolitan area networks in different regions. It usually spans a large physical range, covering from tens of kilometers to thousands of kilometers. It can connect many regions, cities and countries, or span several continents and provide long-distance communication, forming an international long-distance network.

When the distance between hubs in an area exceeds, it must be connected through a router. This type of network is called WAN. If there are branches in North China, Central China and South China, or even overseas branches, these branches are connected by special lines, which is called "Wan".

Local area network refers to a group of computers interconnected in a certain area. Generally speaking, it is only a few kilometers away from Fiona Fang.

LAN can realize file management, application software sharing, printer sharing, workgroup scheduling, e-mail and fax communication services and other functions. LAN is a closed type, which can be composed of two computers in an office or thousands of computers in a company.

Extended data:

Wan Helan:

1, definition

This is a network all over the world.

Compared with WAN, LAN mainly refers to the computer interconnection network in a small area. This "small scope" can be a family, a school, a company, or a government department.

2. Another name

Public network and external network often mentioned in BT, that is, wide area network; BT usually refers to private network and intranet, that is, local area network.

3. Address

Every computer (or other network device) on the WAN has one or more WAN IP addresses; Each computer (or its device) on the LAN has one or more LAN IP addresses.

4. Method

Generally, the IP address of WAN needs ISP to pay to apply, and the IP address of WAN cannot be duplicated.

IP addresses of LANs are allocated within LANs, and IP addresses of different LANs can be repeated without affecting each other.

References:

Baidu Encyclopedia-Wan

References:

Baidu Encyclopedia-Lan