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XV CSMA/CD Frames
While CSMA/CD is the most popular
type of Ethernet in use today, it is not the only one. For reasons beyond
the scope of this work, Novell used 802.2 up through Version 3.11. When
Version 3.12 came out, they switched to 802.3 Technically, 802.3 is
NOT Ethernet. And this is what most people mean when they refer to Ethernet.
To compound the issue, both standards can co-exist however don't have
to inter-operate!
For example, NT4 by default runs
in Auto. It will accept anything looking like a signal. And once it
finds a 'type of Ethernet' it locks on, ignoring all others. An administrator
must specifically configure NT to accept the other types of signals.
The actual signal from many standpoints is identical. It is only when
looking at the logical order within a hunk of data (known as a frame)
that the differences are seen.
 Frame Mismatch
If a computer running IPX will not communicate with a network, (but others can) and it operates properly when using another transport protocol, you have a frame mismatch.
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