Frequently Asked Questions (FAQ)

1:

How are the OSI Model and Transmission Control Protocol/Internet Protocol (TCP/IP) related?

A1:

TCP/IP is not an OSI protocol and does not fit into the OSI Reference Model. TCP/IP is a suite of protocols that has been developed by the U.S. Department of Defense and is used on the Internet. Software supporting TCP/IP is part of nearly every UNIX distribution today. The service provided by TCP/IP is very similar to OSI Layer-3 (Network) and Layer-4 (Transport). IP is considered a Layer-3 protocol and TCP is considered a Layer-4 protocol.

2:

Which is better the OSI Model or the TCP/IP Suite?

A2:

The answer to this question is that neither is better. The OSI Model is just that: it's a model, not to be confused with the OSI Protocol Suite, which was developed by the International Organization for Standardization (ISO). In theory, the OSI Protocol Suite has the more advanced feature set than the TCP/IP protocol suite, but the OSI Protocol Suite was loosely defined and its vendor proprietary standards were too entrenched in existing networks, making it difficult to transition to a standard protocol. The TCP/IP protocol is more tightly defined than the OSI suite, but has gained wide acceptance from vendors, making TCP/IP a de facto protocol standard for internetwork communications.



Network Sales and Services Handbook
Network Sales and Services Handbook (Cisco Press Networking Technology)
ISBN: 1587050900
EAN: 2147483647
Year: 2005
Pages: 269

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