Which capability is supported by Cisco Discovery Protocol but not by LLDP-MED?

A.
LAN speed and duplex discovery

B.
network policy discovery

C.
location identification discovery

D.
power discovery

E.
trust extension

Explanation:
Cisco Discovery Protocol provides an additional capability not found in LLDP-MED
that allows the switch to extend trust to the phone. In this case, the phone is now trusted to mark
the packets received on the PC port accordingly. This feature can be used to off-load the switch
because now it does not need to police the information being received from the phone.