Types of NetworksEdit

There are four types of networks. This includes personal area networks, local area networks, metropolitan area networks and wide area networks. A Local Area Network LAN is a relatively small network that is confined to a small geographic area, such as a single office or abuilding. MANs are larger than traditional LANs and predominantly usehigh-speed media, such as fiber optic cable, for their backbones. A Wide Area Network WAN covers a significantly larger geographic area than LANs or MANs. A WAN uses public networks, telephone lines, and leased lines to tietogether smaller networks. PAN networks are usually wireless, established in anon-demand or ad-hoc fashion when needed to communicate between two or more devices.

Computer NetworkEdit

A computer network, or simply a network, is a collection of computers and other hardware interconnected by communication channels that allow sharing of resources and information.Where at least one process in one device is able to send/receive data to/from at least one process residing in a remote device, then the two devices are said to be in a network. Communication protocols define the rules and data formats for exchanging information in a computer network, and provide the basis for network programming. Well-known communications protocols include two Ethernet, a hardware and link layer standard that is ubiquitous in local area networks, and the Internet protocol suite, which defines a set of protocols for internetworking, i.e. for data communication between multiple networks, as well as host-to-host data transfer, and application-specific data transmission formats.

A network is a group of devices connected to each other. Networks may be classified into a wide variety of characteristics: the medium used to transport the data, communications protocol used, scale, topology, benefit, and organizational scope. Computer networking is sometimes considered a sub-discipline of electrical engineering, telecommunications, computer science, information technology or computer engineering, since it relies upon the theoretical and practical application of these disciplines.Ethernet is a family of protocols used in LANs, described by a set of standards together called IEEE 802 published by the Institute of Electrical and Electronics Engineers. It has a flat addressing scheme and is mostly situated at levels 1 and 2 of the OSI model.


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