Which two statements about CDP are true? (Choose two)
A . It can be disabled only at the interface level.
B . Devices with Cisco Discovery Protocol configured send advertisement messages to a multicast address on a periodic basis
C . It is disabled when switches have mismatched native VLANs.
D . Devices with Cisco Discovery Protocol configured send advertisement messages to a broadcast address on a periodic basis.
E . VTP relies on Cisco Discovery Protocol to carry VTP domain information
Answer: BC