How do I know if my Mac has 100Base-T or 1000Base-T ethernet port?

How do I know if my Mac has 100Base-T or 1000Base-T ethernet port?
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Pull down the Apple Menu to About this Mac and hit More if you are in OS X. In OS 9, pull it down to Apple System Profiler.
You can also find the specifications of your Mac here:
What kind of Mac do you have?  The easiest way I know of is to open up a TERMINAL window and type 'ifconfig'

It should return supported media information...


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