What is the effect of entering the ip arp inspection validate src-mac configuration command on a switch?

What is the effect of entering the ip arp inspection validate src-mac configuration command on a switch?

• A. It checks the source L2 address in the Ethernet header against the sender L2 address in the ARP body
• B. It allows all ARP packets to pass through without validation
• C. It logs all ARP packets received on the switch
• D. It enables ARP forwarding on all interfaces

Answer: (A)

Entering the command to validate the source MAC address in ARP packets on a switch serves a very specific security purpose. This command ensures that the source Layer 2 (L2) address found in the Ethernet frame header is consistent with the sender L2 address specified in the ARP protocol data within the packet. By performing this check, the switch enhances its protection against ARP spoofing or poisoning attacks, where an attacker sends fraudulent ARP messages onto a network. When the switch verifies that these two addresses match, it can prevent malicious users from intercepting traffic or redirecting network communications. The other choices do not accurately describe the function of the command. Some imply a lack of validation or unnecessary logging, which does not align with the intent of ARP inspection features designed to secure the network. This validation improves the reliability and integrity of ARP communications within the network.

Entering the command to validate the source MAC address in ARP packets on a switch serves a very specific security purpose. This command ensures that the source Layer 2 (L2) address found in the Ethernet frame header is consistent with the sender L2 address specified in the ARP protocol data within the packet.

By performing this check, the switch enhances its protection against ARP spoofing or poisoning attacks, where an attacker sends fraudulent ARP messages onto a network. When the switch verifies that these two addresses match, it can prevent malicious users from intercepting traffic or redirecting network communications.

The other choices do not accurately describe the function of the command. Some imply a lack of validation or unnecessary logging, which does not align with the intent of ARP inspection features designed to secure the network. This validation improves the reliability and integrity of ARP communications within the network.