The difference between the Internet and the public **** telephone exchange network, satellite communications network.

Internet, that is, the wide area network, local area network and a single computer in accordance with certain communication protocols composed of international computer networks. The Internet is the result of interconnecting two computers or more than two computer terminals, clients, and servers through the means of computer information technology, people can send e-mails to each other with friends thousands of miles away, *** with the same to complete a job, *** with entertainment

Satellite communications network Consisting of one or more communication satellites and a number of earth stations pointing to the satellite Communication Network

China leased the hemispherical beam transponder of the International Telecommunications Satellite Organization (INTELSAT) satellite over the Indian Ocean from 1985 for satellite TV transmission and telegraph and telephone communication to remote areas.On July 8, 1986, China's domestic satellite communication network was completed. From 1988, it began to use satellites of its own manufacture and launch. In the 1990s, in addition to leasing international satellite transponders, it also leased Asia-1 satellite transponders, which, together with Chinese satellites, formed the domestic satellite communications network. China will gradually transition to a pattern of organizing a domestic satellite communications network based on domestically produced satellites, supplemented by leased international satellites and regional satellite transponders. China's domestic satellite communication network is mainly responsible for: transmission of central TV programs, educational TV programs and local TV programs of some provinces and autonomous regions; satellite transmission of broadcasting programs; organization of mainline satellite communication circuits and some provincial satellite communication circuits; organization of public and private very small antennae earth station (VSAT) networks, including both data-based and telephone-based VSAT networks; and satellite communication networks of special units.

.