What are Lan, Wan and Man?

① Local Area Network (LAN): Generally speaking, it refers to the network in a building or a unit, with the coverage of 10 km. 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. At present, the transmission rate of local area network can generally reach1000 MB/s and1000 MB/s, and the transmission rate of high-speed local area network can reach1000 MB/s2wan (wide area network), which refers to a long-distance and large-scale computer network. Cross-regional, cross-city and cross-country networks are wide area networks. Due to the wide coverage of the wide area and the large number of computers connected to the Internet, the information on the wide area network is very large, and the information resources enjoyed by * * * are very rich. Internet is the largest wide area network in the world, which covers the whole world. ③ Metropolitan Area Network (MAN): Its coverage is between local area network and wide area network. Generally refers to a network covering a city.