Global computer network.

Pixabay
Computers, networks
Global computer network
Computer network - is nothing but a union of several computers simultaneously, allowing them to exchange data. Global network calls when they cover users from around the world. Note that the first civilian computer networks appeared in the United States. But few people know that the very principle of this technology was first used in Russia, and because of this a long time ago the first missile defense system was built.Today, there is not a fairly wide network classification. According to the local distribution of prominent global, regional and local computer networks. Global computer network

Pixabay
Networks, for example, are located in the territory of the state or several states of the global Internet. LANs cover an area of ​​up to several tens of square meters and have regional - network, which are located in the area or city.However, there are two key terms in the ranking of networks - WAN and LAN.WideAreaNetwork (WAN) - covering global computer networks, which include large areas, local area networks and other telecommunication devices and networks.
LocalAreaNetwork (LAN) - Ethernet, which is a separate infrastructure before its release on the service provider. The same period «LAN ہو be able to define and cover several hundred acres of small office network, and a large plant network.The oldest global network is the Internet. The general use of this information resource and distribution services provides various ways to connect to the remote computer, and.

Pixabay
Initially, access to powerful computers accessed multiple remote terminals and computer problem solving global computer networks, called Host S. This connection is unswitched or made via working on converted channels, for example, via the telephone network or dedicated satellite data networks X.25 protocol.To connect to use a modem of such network that is running a special telecommunications program, COMIT Type, PROCOM, BITCOM, MITEZ and others. Managed OS MS-DOS, they will exchange information with the computer to which it was connected.The construction of the same global network is not very difficult to explain. The global network comprise of cells that are provincial networks. LANs in turn consist of small networks and individual computers. Here is a multi-level hierarchy and enables network building. In addition, each device on the network must have its own IP address, or unique identity.

Pixabay
Nowadays, at least one computer in the global computer network used. Basically, it is - home PC. For the most part, those subscribers are network computers, which are incorporated into the local area network, therefore, most experts communicate better than many local area networks considering the options. As to provide. In this case, in contrast to remotely provide a connection to any computer within the local network for a remote computer, or it is necessary. The last option is very relevant as the number of home and personal computers.Right now the switching centers are for X.25 networks using special devices Telenet-manufacturing companies, network devices, LG downloads and so on, well, for a TCP / IP networks use routers and Cisco Decnis firms As Ericsson, Siemens. However, technology does not stand still, and it is likely that in the future we will now see an even more efficient organization of global networks, which has a huge impact on the lives of almost everyone.