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Computer Network

 

COMPUTER NETWORK

A COMPUTER NETWORK IS A GROUP OF COMPUTERS LINKED TO EACH OTHER THAT ENABLE COMPUTERS TO COMMUNICATE WITH EACH OTHER COMPUTERS AND SHARE THEIR RESOURCES, DATA AND APPLICATIONS.
COMPUTER NETWORK DIAGRAM

FIRST PUBLIC PACKET-SWSITCH

ARPANET, IN FULL ADVANCED RESEARCH PROJECTS AGENCY NETWORK, EXPERIMENTAL COMPUTER NETWORK THAT WAS THE FORERUNNER OF THE INTERNET. IN 1961THE U.S.

 ADVANCED RESEARCH PROJECTS AGENCY NETWORK (ARPANET) WAS THE FIRST PUBLIC PACKET-SWITCHED COMPUTER NETWORK.IT WAS FIRST USED IN 1969.

TYPES OF NETWORK

PAN NETWORK

A PERSONAL AREA NETWORK IS A COMPUTER NETWORK FOR INTERCONNECTING ELECTRONIC DEVICES WITHIN AN INDIVIDUAL PERSON'S WORKSPACE.

A PAN PROVIDES DATA TRANSMISSION AMONG DEVICES SUCH AS COMPUTERS, SMARTPHONES, TABLETS AND PERSONAL DIGITAL ASSISTANTS.

PAN NETWORK RANGE IS 10 METER.
 
PAN NETWORK FIGURE

LAN NETWORK

A LOCAL AREA NETWORK IS A COLLECTION OF DEVICES CONNECTED TOGETHER IN ONE PHYSICAL LOCATION, SUCH AS AN OFFICE OR HOME BUILDING.

A LAN IS USED TO CONNECT THE COMPUTER AND OTHER NETWORK DEVICES SO THAT THE DEVICE CAN COMMUNICATE WITH EACH OTHER TO SHARE RESOURCES.

LAN NETWORK RANGE IS 1 TO 10 KILO METER.

MAN NETWORK

IT COVERS A LARGE GEOGRAPHICAL AREA BY INTERCONNECTING A DIFFERENT LAN TO FORM A LARGE NETWORK IT HAS A GREATER RANGE THAN A LAN.

WHEN DIFFERENT LOCAL AREA NETWORKS ARE CONNECTED AND INTERCONNECT AND COMMUNICATE WITH EACH OTHER, THEY BECOME A MAN NETWORK.

LAN NETWORK RANGE IS 2 TO 50 KILO METER.


MAN NETWORK FIGURE

WAN NETWORK

A WIDE AREA NETWORK IS A TELECOMMUNICATIONS NETWORK THAT EXTENDS OVER A LARGE GEOGRAPHIC AREA. WIDE AREA NETWORKS ARE OFTEN ESTABLISHED WITH LEASED TELECOMMUNICATION CIRCUITS.

COLLECTION OF DIFFERENT LAN AND DIFFERENT WAN NETWORK.
WAN NETWORK FIGURE

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