Q:
ios vs osi
What is the difference between IOS and OSI model?
ASKED:
Oct 15 2007 2:50 AM GMT
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A:
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Thanks for the question-
A few different confusion acronyms here...
First, there is IOS - the Cisco operating system for routers. I don't think that has anything to do with what you are asking.
Second, there is the very popular OSI reference model for how different pieces of software, hardware, drivers, and applications all work together to allow computers to communicate over a network. It is called the 7 layer model sometimes because it has the following 7 layers-
Layer 7: Application layer
Layer 6: Presentation layer
Layer 5: Session layer
Layer 4: Transport layer
Layer 3: Network layer
Layer 2: Data Link layer
Layer 1: Physical layer
The International Organization for Standardzation (Another ISO), created the OSI reference model. You can read about the ISO here-
http://en.wikipedia.org/wiki/International_Organization_for_Standardization
You can read more about the OSI model here-
http://en.wikipedia.org/wiki/OSI_model
Third, there is the TCP/IP Reference model created by the Department of Defense (DoD) that details a similar model to the OSI model. Information on it can be found here- http://en.wikipedia.org/wiki/TCP/IP_model
I hope that helps!
David Davis
Personal website: HappyRouter.com
Visit my Cisco Blog on ITKE
