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…..