I am new to cisco. I have a simple question
when you are reading something like
or fas 0/1
what does the "fas" stand for? Is it relating to a ethernet interface on a router? on a switch?
or is it talking about a port on a router? on a switch?
On a Cisco router, you only have to include as many letters in a command as it takes to make it unique. In the case of interfaces, there are no other types of interfaces that start with Fas, therefore, using the first three letters of "FastEthernet" makes it unique. Another example is 'GigabitEthernet' - you can simply type in 'Gi' to refer to those.
The 'fas' is valid for both switch and router interfaces - they use the same convention.
Hope that helps - pls rate the post if it does.