What Are Computer Networks ,Details Of All And Use Of LAN ,WAN, MAN,PAN

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DEFINTION :
A computer network is defined as the interconnection of two or more computers. It is done to enable the computers to communicate and share available resources.

THE USE OF COMPUTER NETWORK
 Business Applications
 online buying
 Home Applications
 mail, chat
 Mobile Users
 wireless: laptops, PDA, mobile, in plane
 Social Issues

computer networks

CLASSIFICATION OF AREA BY
THEIR GEOGRAPHY

PERSONAL AREA NETWORK(PAN)
 A personal area network is a computer network organized around an individual person.
 It generally consists of a mobile computer, a cell phone or personal digital assistant. PAN enables the communication among these devices.
 It can also be used for communication among personal devices themselves for connecting to a digital level network and internet.
 The PANs can be constructed using wireless orcables.

 

WIDE AREA NETWORK(WAN)
 When network spans over a large distance or when the computers to be connected to each other are at widely separated locations a local area network cannot be used. A wide area network(WAN) is installed.
 The communication between different users of WAN is established using leased telephone lines, satellite links and similar channels.
 It is cheaper and more efficient to use the phone network for the link.
 Most WAN networks are used to transfer large blocks of data between its users.

LOCAL AREA NETWORK(LAN)
 LAN is a network which is designed to operate over a small physical area such as an office, factory or a group of buildings.
 LAN’s are easy to design and troubleshoot
 Exchange of information and sharing of resources becomes easy because of LAN.
 In LAN all machines are connected to a single cable.
 Different types of topologies such as star, tree, bus, ring, etc Can be used
 It is usually a privately owned network.

METROPOLITAN AREA NETWORK(MAN)
 It is in between LAN & WAN technology that covers the entire city.
 It uses similar technology as LAN.
 It can be a single network such as cable TV network, or a measure of connecting a number of LAN’s o a large network so thatresources can be shared LAN to LAN as well as device to device.

CAMPUS AREA NETWORK(CAN)
 The campus area network is made up of aninterconnection of LAN with limited geographical area.
 Network equipments such as switches, routers and the transmission media i.e. optical fibre etc are almost entirely owned by the campus owner.