What is the effect of this configuration?

By | November 19, 2022

Refer to the exhibit. What is the effect of this configuration?

  • A. The switch port remains administratively down until the interface is connected to another switch.
  • B. Dynamic ARP Inspection is disabled because the ARP ACL is missing.
  • C. The switch port interface trust state becomes untrusted.
  • D. The switch port remains down until it is configured to trust or untrust incoming packets.
Answer: Option C.
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-inthemiddle attacks. After enabling DAI, all ports become untrusted ports.

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