Extranet is also called wide area network, extranet and 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. WAN is different from Internet.
The difference between intranet and extranet:
1, transmission distance difference:
The geographical coverage of local area network is generally below 10 km, and the geographical coverage of wide area network is very large, from tens of kilometers to tens of thousands of kilometers, spanning countries and continents, forming a global computer network.
2, the transmission rate difference
Because the transmission distance directly affects the transmission speed, the communication in local area network is generally short in transmission distance and high in transmission speed.
3. Differences in composition
WAN consists of many switches, which are connected by point-to-point lines. Almost all point-to-point communication methods can be used to establish a wide area network, including private line, optical fiber, microwave and satellite channels. LAN consists of network hardware (including network server, network workstation, network printer, network card, network interconnection equipment, etc.). ), network transmission media and network software.
4, the difference between security interception
Generally speaking, routers or gateways will not block external connection requests initiated by computers in local area networks (LAN, private network and intranet), but routers or gateways will block connection requests initiated by computers in local area networks in most cases.
References:
Baidu Encyclopedia: Wan
Baidu Encyclopedia: Lan