What Is Networking

NETWORK :: two or more comps connected together ...

COMMUNICATION:  exchange (not transfer(one send & other receives..))of info b/w 2 or more entities (bodies).....

entites : any thing which have some attributes

COMMUNICATION MODEL:

the diagram which represent the trasfer of data b/w two entities

source---->transmitter----->transmission sys---->receiever---->destination.

·                     SOURCE :: ( creater/generator )generates data to be transmitred.

·                     TRANSMITTER :: converts generted data nto transmittable signals.

·                     TRANSMISSION SYS :: the channel through which data s trasfered.

·                     RECEIEVER :: converts receieved signals in to data.

·                     DESTINATION:: the final party which recieves data

EXAMPLES OF COMMUNICATION MODEL:

1 . TELEPHONE SYS:

·                     person 1

·                     telephone:::convert sound waves nto EMW(wlectro magentic waves)

·                     telephone cables & exchange..

·                     other telephone set....EMV----->sound waves

·                     person 2

2 . TV SYS:

·                     tv station

·                     transmitting aintaina audio + video------>EMV

·                     air

·                     aintina & LNB

·                     tv set

3 . EMAIL SYS:

·                     person A+ computer

·                     modem (mo  D----->A )

·                     cable + air

·                     modem (dem A---->D)

·                     person B......

assignemnts 19 sep ......

RADARS

geo stationary oribital sys

human nervous sys.....

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