I’ve run across this type of question a couple of times in labs:
Configure interfaces fa0/19 – 21 into an EtherChannel using an open standards protocol.
Configure interfaces fa0/19 – 21 into an EtherChannel using a Cisco proprietary protocol.
This always throws me for some reason. I know that the two EtherChannel protocols are PaGP and LACP, but I can never remember (probably because I never thought that it would be important) which protocol is Cisco proprietary and which is open standards. I tried looking this up in the DOC CD one time, but did not see it mentioned. I eventually just hit Wikipedia to get the answer, but I’m pretty sure that will not be available in the lab.
I’ve developed a simple (and most likely stupid) method of remembering this:
PaGP starts with P which is the letter that ‘proprietary’ starts with.
It’s kind of lame, but it gets the job done for me so I thought that I would share.