Refer to the exhibit.
What is the effect of this configuration?
A . The switch port interface trust state becomes untrusted
B . The switch port remains administratively down until the interface is connected to another switch
C . Dynamic ARP inspection is disabled because the ARP ACL is missing
D . The switch port remains down until it is configured to trust or untrust incoming packets
Answer: A
Explanation:
Dynamic ARP inspection (DAI) is a security feature that validates ARP packets in a network. It intercepts, logs, and discards ARP packets with invalid IP-to-MAC address bindings. This capability protects the network from certain man-in-the-middle attacks. After enabling DAI, all ports become untrusted ports.
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