Which statement about the use of PAgP link aggregation on a Cisco switch that is running Cisco IOS Software is true?

Which statement about the use of PAgP link aggregation on a Cisco switch that is running Cisco IOS Software is true?
A . PAgP modes are off, auto, desirable, and on. Only the combinations auto-desirable, desirable-desirable, and on-on allow the formation of a channel.
B . PAgP modes are active, desirable, and on. Only the combinations active-desirable, desirable-desirable, and on-on allow the formation of a channel.
C . PAgP modes are active, desirable, and on. Only the combinations active-active, desirable- desirable, and on-on allow the formation of a channel.
D . PAgP modes are off, active, desirable, and on. Only the combinations auto-auto, desirable- desirable, and on-on allow the formation of a channel.

View Answer

Answer: A

Explanation:

PAgP modes are off, auto, desirable, and on. Only the combinations auto-desirable, desirable- desirable, and on-on will allow a channel to be formed.

The PAgP modes are explained below.