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Overview of Networking

Overview of Networking

A computer network consists of two or more computers that are connected, usually by physical media, and are running software which enables them to communicate.

A LAN is a Network of computers in close proximity, while a WAN is a computer Network spread out over a wide area, minimum hardware and software components of a LAN include a server, a work station or client, a Network adapter for each computer, media to connect the computers, a network––aware operating system, appropriate network protocol drivers, and network –– aware applications.

The ISO and the IEEE have developed models that are standards for designing computer Networks. The OSI model includes the following layer; Application, Presentation, Session, Transport, Network, Data Link and Physical.

The IEEE 802 model divides the data link layer into two sub layers, the logical link control (LLC) and the Media access control (MAC) sub layer.