Joining me as we do a few review questions
regarding Dynamic ARP Inspection,
beginning with question number one.
How does this Dynamic ARP Inspection dynamically
know about which IP/MAC address mappings are correct?
That's the question, consider the answers,
and we'll be right back.
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And the answer to this question, it WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
And the answer to this question, it
relies on information that was gathered via DHCP snooping.
That put the information about the IP address
and the MAC address in the DHCP snooping binding table,
and that's what Dynamic ARP Inspection
is going to look at to see whether or not
the mappings are correct regarding ARP messages
that it sees.
And question number two, which methods
would allow a device which is not, I repeat not,
in the DHCP snooping binding table
to still be allowed to send ARP messages into the network?
So from this list, go ahead and choose two. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
So from this list, go ahead and choose two.
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So the two answers that are going
to work here from the list is answer B. One of them
is Dynamic ARP Inspection, make it a trusted port,
and that way there won't be any checks regarding its ARP
messages coming in on that port.
And the other option is to create an ARP access
list with layer 3 and layer 2 mappings, and associate that
and tell Dynamic ARP Inspection to refer to that as well. WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
and tell Dynamic ARP Inspection to refer to that as well.
So these two answers, answers B and D,
are the correct answers to this question.
Let's do one more, and that is question number three.
What is the command to actually implement Dynamic ARP
Inspection on a VLAN?
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And the correct syntax is, the winner
is, answer B, ip arp inspection, the keyword vlan, and the VLAN WEBVTT X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000
is, answer B, ip arp inspection, the keyword vlan, and the VLAN
that you want to apply Dynamic ARP Inspection to.
So it's been a lot of fun as we've
gone through the videos and labs for Dynamic ARP Inspection,
including this review.
I hope this has been informative for you,
and I'd like to thank you for viewing.