PROTOCOLS

Same setup rules and regulation for the communication between two different machines on the layer level is called protocol. For example a company manager will discuss the matter with the other company manager not and a director will meet with the director. Same as if the two machines want to communicate with each other so they have needed the protocol. Protocol is very important play role for communication. On network you cannot communicates between two machines without protocols.

ENCAPSULATION

It is also very important software for the networks. Because when a person type “HELLO” for the other machine, the word hello has no destination address because of this the word hello is for other machine so it has need the other machine’s address so the other machine address write on the packet of this word “HELLO” is called encapsulation. The other machine checks the destination address and after confirmation that the packet is for him it accept it. Without encapsulation the other machine will not accept the packet. So encapsulation is also important for the communication. 

Example of encapsulation

We try to understand the encapsulation with some examples. A man is feel pain in his throat, he need the amoxil capsule for relief form pain. The chemist gives him the powder of amoxil, but the refuse to take it, because that is a simple powder fin his sense without the cover (capsule). Then a chemist give him a capsule that have no name on it, patient will not eat it because he said that it has no name and I will not eat it without the name. Now chemist gives him a capsule that has a name of amoxil write on it. The will accept that capsule easily because he know that the amoxil capsule is for pain of throat. Like this patient the packets have needs the encapsulation for their identity.