Huawei Certified Network Associate – Routing and Switching (HCNA-RS, legacy) — Question 88

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

Answer options

• 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.

Correct answer: A, B

Explanation

The correct answers, A and B, are accurate because a system uses gratuitous ARP packets to detect IP address conflicts and they indeed share the same structure as ARP requests. Options C and D are incorrect; gratuitous ARP packets do not change IP addresses and they do not use the same format as ARP replies.