What is the effect of entering the ip arp inspection validate src-mac configuration command on a switch?
- It checks the source L2 address in the Ethernet header against the sender L2 address in the ARP body.
- It disables all trunk ports.
- It displays the IP-to-MAC address associations for switch interfaces.
- It enables portfast on a specific switch interface.
Explanation: The ip arp inspection validate src-mac command is a supplemental DAI feature used to prevent ARP spoofing. It specifically instructs the switch to check the source MAC address in the Ethernet header and compare it against the sender MAC address found in the body of the ARP packet. If these two Layer 2 addresses do not match, the ARP packet is considered invalid and is dropped.
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