Which of the following statements about gratuitous ARP packets are true? (Choose two)

A.
A system can determine whether conflicting IP addresses are used by sending a gratuitous ARP packet

B.
A gratuitous ARP packet uses the same format as an ARP request packet.

C.
A gratuitous ARP packet can help to update an IP address.

D.
A gratuitous ARP packet uses the same format as an ARP reply packet.

Explanation: