What is the purpose of the DHCPv6 Guard?
A. It messages between a DHCPv6 server and a DHCPv6 client ( or relay agent).
B. It shows that clients of a DHCPv5 server are affected.
C. It block DHCPv6 messages from relay agents to a DHCPv6 server.
D. It allows DHCPv6 replay and advertisements from (rouge) DHCPv6 servers.
