Types of Network.

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Task2         Network        Monish Bosquet

Types of Network

LAN-Local Area Network

LAN connects computers within an organisation so that they can share data and resources. Some LANs have only two or three computer but others link together hundreds of computers. Most LANs are set up in a single building. But a LAN can extend through adjacent buildings.

WAN-Wide Area Network

        WAN use modems and the telephone system to communicate computer by greater distance than those covered by LAN.

MAN- Metropolitan Area Network

MAN is a data network intended to serve an area the size of a large city. Such networks are being implemented by innovative techniques, such as running optical fibre through subway tunnels. A popular example of a MAN is SMDS.

SMDS- switched multi-megabit data service which is an emerging high-speed datagram-based public data network service and expected to be widely used by telephone companies as the basis for their data networks.

PSDN-Packet Switch Data Network

PSDN is a data communication network that is based on the principal of packet switching. As opposed to circuit switching that is use in public telephone networks.

ISDN-Intergraded Service Digital Network

        ISDN is a system of digital phone connection that allows data to be transmitted simultaneously across the world using end to end digital connectivity.

The two basic types of ISDN are Basic Rate Interface and Primary Rate Interface.

Broadband

        Broadband refers to telecommunication that provide multiple channel of data over a single communications medium, typically using some form of frequency or wave division multiplexing.

P2P-Peer to Peer Network

        P2P is a network that connects individual users with each other and also allows them to share files without having to pass the information through controlled server.

Types of Network Topologies

Bus topology

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In bus topologies, all computers are connected to a single cable or backbone, by a transceiver either directly or by using a short drop cable. All ends of the cable must be terminated, that is plugged into a device such as a computer or terminator. Most bus topologies use coax cables.

Star topology

A star topology is connected by cables to a hub. In this topology management of the network is made much easier such as adding and removing devices, because of the central point. However because it is centralized more cable is required.

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