PROTOCOLS

Communication between two people or two devices needs to follow some rules.it defines how to start communication, continue the communication & end the communication.

 What is protocol:-

·  A protocol is a set of rules that regulate communication.

· Communication between two people or two devices needs to follow some rules.it defines how to start communication, continue the communication & end the communication.

· As in the telephonic communication these rules define that how one can respond the call, continue the call in a fair manner (using proper greeting language), & how to hanging up the call.

·Similarly, in a network for sending & receiving the  information between two different system needs some protocols.

NOTE:-  in OSI layer each layer has a protocol. But physical layer (first layer)has no protocol because in it data is  the binary form.

For example:-

In real life example when a child go to school & follow the all rules in the school then there are a good environment & he get a good service. Similarly, in networking there are many set of rules(protocols)who helps in reliable data transfer,& better service. if any rules break in school or network then everything will become unsystematic & not get a good service. So we always need a set of rules.