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, desirabledesirable, and on-on allow the formation of a channel.
B. PAgP modes are active, desirable, and on. Only the combinations active-desirable, desirabledesirable, and on-on allow the formation of a channel.
C. PAgP modes are active, desirable, and on. Only the combinations active-active, desirabledesirable, and on-on allow the formation of a channel.
D. PAgP modes are off, active, desirable, and on. Only the combinations auto-auto, desirabledesirable, and on-on allow the formation of a channel.
