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what are the diffirences?

Posted on 2002-03-23
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hi people,
          what are the main differences between switches I mean layer 1,2,3,4,5,6,7 switches.Thanx

 
                   
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Question by:mohammadsa
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quietyakr3 earned 150 total points
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http://www.webopedia.com/quick_ref/OSI_Layers.html

The layers refer to the 7 layers of the OSI model.  Here's the 7 layers with some examples of what a switch for that layer would be:

1 - Physical - this would be like a normal light switch
2 - Data Link - this is what you hear of as a classical network switch (basically a multi-port bridge)
3 - Network - This is really a router that attempts to do as much routing as possible in hardware switching components
4 -7 - Transport, Session, Presentation, Application - These switches are basically just an extension of a L3 switch.  Instead of knowing how to "switch" traffic from port to port simply based on Network addresses, they can follow data flows, etc.
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