Which is a correct statement about aggregating ports together?

A. The term EtherChannel is a Cisco proprietary term for port channeling.
B. PAgP can be used with non-Cisco products.
C. LACP can only be used with other Cisco switches.
D. PAgP can bundle several different speeds and duplexes together.

A. The term EtherChannel is a Cisco-centric term. Most vendors will not recognize the term.