WHEN A COMPUTER NETWORK IS ESTABLISED THERE IS LOT OF THINGS REQUIRED TO IMPLEMENT THIS. SOME OF THEM MAY BE HARDARE AND SOME OF THEM MAY BE SOFTWARE. THESE THINGS DEPEND UPON TYPE OF COMPUTER NETWORK ALSO. SOME USED COMPONENTS ARE AS FOLLOWING.
NETWORK INTERFACE CARD (NIC)
A NETWORK CARD IS USED TO ATTACH A COMPUTER PHYSICALLY TO NETWORK. NIC IS ALSO REFFERED AS LAN CARD OR ETHERNET CARD. BY THE HELP OF THIS COMPUTER CAN PARTICIPATE IN NETWORK COMMUNICATION. NOW A DAYS MOST OF THE COMPUTERS COME WITHIN INBUILT CARD.
NIC CARD
TRANSMISSION MEDIA IS A PATH BY WHICH MESSAGE TRAVELS FROM SOURCE TO DESTINATION IN THE NETWORK. IT MAY BE SOME WIRE (COAXIAL CABLE OR FIBRE OPTICS), RADIO WAVE, MICROWAVE, OR SATELLITE. MODERN ETHERNET NETWORKS USE A TWISTED PAIR CABLE CONTAINING EIGHT WIRES.
NETWORK CABLE
HUB
IT IS A CENTRAL HARDWARE DEVICE THAT MESSAGE THE FLOW OF INFORMATION AMONG VARIOUS NODES (COMPUTERS) IN THE NETWORK.
HUB
BRIDGE
BRIDGE IS A DEVICE USED TO CONNECT TWO IDENTICAL LOCAL AREA NETWORKS(LANs).
BRIDGE
REPEATER
INFORMATION CARRYING SIGNALS IN NETWORK GET WEAK AFTER TRAVELLING CERTAIN DISTANCE. REPEATER IS A DEVICE THAT RECEIVES THE SIGNAL BEFORE IT BECOMES TOO WEAK AND CREATES ITS COPY BIT BY BIT AT THE ORIGINAL STRENGTH.
REPEATER
ROUTER
ROUTER IS A DEVICE USED TO CONNECT TWO NON-IDENTICAL NETWORKS. IT IS USED TO ROUTE THE DATA ACROSS DIFFERENT PARTS OF THE NETWORK WHEN THE COMPUTERS ARE CONNECTED IN WAN (WIDE AREA NETWORK).
ROUTER
GATEWAY
GATEWAY IS A DEVICE USED TO CONNECT TWO DISSIMILAR LANs. IT IS REQUIRED TO CONVERT DATA PACKETS FROM ONE PROTOCOL FORMAT TO ANOTHER BEFORE FORWARDING IT.
GATEWAY
CONNECTOR
CONNECTOR IS A DEVICE THAT JOINS TWO COMPUTER OR NETWORKS TOGETHER.
CONNECTOR
NETWORK OPERATING SYSTEM (NOS)
NOS IS A SPECIALISED OPERATING SYSTEM REQUIRED BY ALL THE COMPUTERS IN THE NETWORK. IT ENABLES SERVICES AND SHARING OF THE VARIOUS RESOURCES IN THE NETWORK AND CO-ORDINATION AMONG THEM.
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COMPUTER NETWORK