Which statement about Cisco devices learning about each other through Cisco Discovery Protocol is true?

Which statement about Cisco devices learning about each other through Cisco Discovery Protocol is true?
A . Each device sends periodic advertisements to multicast address 01:00:0C:CC:CC:C
C . Each device broadcasts periodic advertisements to all of its neighbors.
D . Each device sends periodic advertisements to a central device that builds the network topology.
E . Each device sends periodic advertisements to all IP addresses in its ARP table.

View Answer

Answer: A

Explanation:

Cisco devices send periodic CDP announcements to the multicast destination address 01-00-0c- cc-cc-cc, out each connected network interface. These multicast packets may be received by Cisco switches and other networking devices that support CDP into their connected network interface. Reference: http://network.spravcesite.net/subdom/network/index.php?id=cdp