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COMPONENTS FOR NETWORKING, COMPONENTS USED FOR NETWORKING COMPUTER…
COMPONENTS FOR NETWORKING
NETWORK INTERFACE CARD (NIC)
EACH DEVICE THAT WANTS TO CONNECT TO A NETWORK NEEDS A NETWORK INTERFACE CARD
IT PROVIDES THE HARDWARE INTERFACE BETWEEN A COMPUTER AND A NETWORK SO AS TO ENABLE COMMUNICATING OVER THE NETWORK WITH THE COMPUTERS
NETWORK CABLE
TWISTED PAIR CABLE
SHIELDED
UNSHIELDED
COAXIAL CABLE
SINGLE COPPER CONDUCTOR
EXAMPLE-TELEVISION CABLE NETWORKS
FIBRE OPTIC CABLE
USED FOR DATA TRANSMISSION OF LARGE SCALE
IT IS BENDABLE THOUGH IT IS MADE OF GLASS AND IS TYPICALLY USED IN WANs(Wide area network)
ITS USE ELIMINATES ISSUES REGARDING ELECTRICAL INTERFERENCE
MODEM(MODULATOR AND DEMODULATOR
USED TO TRANSFER AND RECEIVE DATA VIA THE TELEPHONE CABLE LINES
A COMPUTER STORES IT'S DATA IN THE DIGITAL FORM. SO WHEN THE COMPUTER RECEIVES SIGNAL,THE MODEM CONVERTS THE ANALOG SIGNAL INTO DIGITAL SIGNAL
THE MODEM CONVERTS DIGITAL SIGNAL INTO ANALOG SIGNAL WHEN SIGNAL IS TRANSMITTED FROM THE COMPUTER VIA CABLES
ROUTER
A HARDWARE DEVICE
CONNECTS TWO DIFFERENT NETWORKS OF THE SAME TYPE
COMMONLY USED IN HOUSES TO CONNECT VARIOUS DEVICES TO THE SAME NETWORK AND TO SHARE DATA USING THE SAME NETWORK
GATEWAY
A NODE ON A NETWORK THAT ACTS AS A DOORWAY TO OR FROM ANOTHER NETWORK
ENABLES US TO CONNECT MULTIPLE NETWORKS OF DIFFERENT TYPES
TWO TYPES OF HOW IT CAN BE IMPLEMENTED
HARDWARE
SOFTWARE
HUB
COMMON CONNECTION POINT FOR MANY COMPUTERS IN A LAN
HUB BASED NETWORKS ARE NOT SAFE AS THEY SEND A MESSAGE MEANT FOR A PARTICULAR COMPUTER TO EVERYBODY IN THE NETWORK
SWITCH
FUNCTIONS LIKE A HUB
SWITCHES ARE MORE SAFER THAN HUB AS THEY CHECK FOR WHOM THE MESSAGE IS MEANT AND SEND THE MESSAGE ONLY TO THAT COMPUTER IN THE NETWORK
INTERNET SERVICE PROVIDER (ISP)
ISPs ARE ORGANISATIONS THAT PROVIDE INTERNET TO ITS USERS
SOME COMMON ISP ORGANISATIONS IN INDIA ARE AIRTEL,BSNL,IDEA,VODAFONE ETC.
AN ISP GIVES ITS USER A USERNAME AND A PASSWORD TO CONNECT WITH THE INTERNET. A PASSWORD THEREFORE SECURES THE INTERNET CONNECTION AND FORBIDS ILLEGAL USE AND USE BY NON-USERS
BANDWIDTH
MEASURED IN bps(BITS PER SECOND)
TERM USED FOR MEASURING THE SPEED OF INTERNET CONNECTION
THE MORE THE BANDWITH, THE FASTER ARE THE THINGS USING INTERNET DONE
COMPONENTS USED FOR NETWORKING
COMPUTER HOLIDAY HOMEWORK
STD-8 ROLL NO.29