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Exam 200-301 topic 1 question 611 discussion

Actual exam question from Cisco's 200-301
Question #: 611
Topic #: 1
[All 200-301 Questions]


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.
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Suggested Answer: C 🗳️
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.
by ansari at May 7, 2020, 12:25 p.m.

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Ebenezer
Highly Voted 4 years, 3 months ago
After Dynamic ARP Inspection is applied, by default the interface becomes untrusted.
upvoted 14 times
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BooleanPizza
Highly Voted 3 years, 4 months ago
Answer is correct, also to make this port trusted you need to add the 'ip arp inpection trust' command on int fa0/1
upvoted 10 times
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LTTAM
Most Recent 4 years ago
Answer is correct. As per Cisco documentation.... " In a typical network configuration for DAI, all ports connected to host ports are configured as untrusted..." Source: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/25ew/configuration/guide/conf/dynarp.html
upvoted 3 times
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