Difference between OSI model and TCP/IP model.

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             OSI

                 TCP/IP

1. OSI is a generic, protocol independent standard, acting as a communication gateway between the network and end User.

1. TCP/IP model is based on standard Protocol around which the Internet has developed. It is a communication protocol, which allows connections of hosts over a network.

2. In OSI model the transport layer Guarantees the delivery of packets.

2. In TCP/IP model the transport layer does not guarantee delivery of packets. Still the TCP/IP model is more reliable.

3. Follows vertical approach.

3. Follows horizontal approach.

4. OSI is a reference model around which the networks are built.  Generally, it is used as a guidance tool.

4. TCP/IP model is, in a way implementation of the OSI model.

5. Network layer of OSI model provides both connection oriented and connectionless service.

5. The Network layer in TCP/IP model provides connectionless service.

6. OSI model has a problem of fitting the protocols into model.

6. TCP/IP model does not fit any protocol.

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