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What is difference between OSI reference Model and TCP/IP Model

Asked by suman tiwari, 29 Nov '08 11:32 pm
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Answers (3)


osi model is a layered framework for design of network system that allows to communicate with all the computer system, and tcp/ip is a protocal suite that defines how data is exchanged across varoius computers over internet.
purpose of osi model is to show that how to faclitate a communication between different computers without requring changes in the logic of h/w and s/w. whereas the purpose of tcp/ip is to connect multiple networks. of layers---
the osi model has 7 layers,whereas tcp/ip has 4 layers.
4.protocol/model ---
osi model is a model not a protocol .i.e first the model was designed and then protocol was designed,whereas tcp/ip model is reverse of the osi model. i.e. first protocal was designed and the model is use as a discripition of an existing protocol.
Answered by shivani, 25 Sep '09 07:38 pm

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The major differences between the OSI and TCP/IP are:

# The application layer in TCP/IP handles the responsibilities of layers 5, 6 and 7 in the OSI model.

# The transport layer in TCP/IP does not always guarantee reliable delivery of packets at the transport layer, while the OSI model does. TCP/IP also offers an option called UDP that does not guarantee reliable packet delivery.
Answered by Rabindranath Sahu, 29 Nov '08 11:35 pm

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OSI is developed by ISO and it divided all network function into seven layer. application, presentation, session, transport, network, data link and physical.

TCP/IP is suite or collection of protocols. It divided the same function into four layers. application, transport, internet and physical.
you can distinguish these two model here -and-tcpip-protocol-suite/
Answered by Jeeshan Anwa, 07 Mar 04:00 pm

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