What is OSI model

 OSI model:- OSI stands for open system interconnection it consist of seven layer 

7. Application 

6. Presentation layer

5. Session layer 

4. Transport layer 

3. Network layer 

2. Data link layer

1. Physical layer 

Application layer :- It provides networking option to the programs.

Presentation layer :- It receives data from application layer and converts into correct format  so that application of remote computer can understand the the data. it also handles encryption and compression.

Session layer :- When host want to connects the remote computer it's session layer job to maintain session.

Transport layer :- Transport layer decides on which protocol data has to be send , (TCP or UDP) It also divide data into small parts ( in TCP called segments and in UDP called datagram ) .

Network layer :- Network layer assign destination IP address to the packets.

Data link layer :- It add the physical address to the packets.

Physical layer :- It is just below the hardware of computer, it converts data in to electric signals. 

#princekrvert #princekumar #networking