which are the two approved functions of EMC’s implementation of Cisco Systems Fast EtherChanne

Of the following, which are the two approved functions of EMC’s implementation of Cisco Systems Fast EtherChannel (Celerra Trunking)? (Choose two)

A.
Fault Tolerance among switch ports

B.
Fault Tolerance between multiple switches

C.
Combining multiple physical interfaces into a logical interface

D.
Bandwidth Aggregation