August 19, 2012

Concept of Networks and its types

Concept of etworks

Consist of two or more computer connected to each other.
Share resources (such as disks, files,directories, printers, CD-ROMs etc.)
Exchange files, data and allow electronic communication between them.

Types of Networks

Local Area Network (LAN)
Metropolitan Area Network (MAN)
Wide Area Network (WAN)

Local Area Network

Confined to a relatively small area.
Generally limited to a geographical area such as a
school, building or an office.
Rarely are LAN computers more than a mile apart.

Metropolitan Area Network (MAN)

Covers larger geographical areas, such as cities.

Wide Area Network

Connects larger geographical areas, such as the whole of India or the world.

Dedicated transoceanic cabling or satellite communication may be used to connect this type of network.
Peer-to-peer operations

Peer-to-peer operations
All computers are considered equal.
Designed primarily for small to medium local area networks.


Less initial expense - No need for a dedicated server.
An operating system (such as Windows 95) already in place, may only need to be reconfigured for peer-to-peer operations.


No central repository for files and applications.

Does not provide the security available on a client/server network.

Fiber Distributed Data Interface(FDDI)
Mar, 14 '10 Subject: Learning, Viewed by: 31
Fiber Distributed Data Interface (FDDI) is a network protocol that is used primarily to interconnect two or more local area networks, often over large distances.

Uses a dual ring physical topology. Transmission normally occurs on one of the rings.

If a break occurs, the system keeps information moving, by automatically using portions of the second ring to create a new complete ring.

Advantage: It operates over fiber optic cable at 100 Mbps

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