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Joining me as we do a
few review questions

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regarding Dynamic
ARP Inspection,

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beginning with
question number one.

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How does this Dynamic ARP
Inspection dynamically

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know about which IP/MAC
address mappings are correct?

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That's the question,
consider the answers,

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and we'll be right back.

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[MUSIC PLAYING]

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And the answer to
this question, it
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And the answer to
this question, it

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relies on information that was
gathered via DHCP snooping.

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That put the information
about the IP address

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and the MAC address in the
DHCP snooping binding table,

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and that's what
Dynamic ARP Inspection

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is going to look at
to see whether or not

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the mappings are correct
regarding ARP messages

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that it sees.

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And question number
two, which methods

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would allow a device which
is not, I repeat not,

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in the DHCP snooping
binding table

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to still be allowed to send
ARP messages into the network?

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So from this list, go
ahead and choose two.
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So from this list, go
ahead and choose two.

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[MUSIC PLAYING]

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So the two answers
that are going

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to work here from the list
is answer B. One of them

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is Dynamic ARP Inspection,
make it a trusted port,

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and that way there won't be
any checks regarding its ARP

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messages coming in on that port.

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And the other option is
to create an ARP access

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list with layer 3 and layer 2
mappings, and associate that

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and tell Dynamic ARP Inspection
to refer to that as well.
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and tell Dynamic ARP Inspection
to refer to that as well.

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So these two answers,
answers B and D,

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are the correct answers
to this question.

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Let's do one more, and that
is question number three.

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What is the command to
actually implement Dynamic ARP

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Inspection on a VLAN?

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[MUSIC PLAYING]

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And the correct
syntax is, the winner

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is, answer B, ip arp inspection,
the keyword vlan, and the VLAN
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is, answer B, ip arp inspection,
the keyword vlan, and the VLAN

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that you want to apply
Dynamic ARP Inspection to.

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So it's been a lot
of fun as we've

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gone through the videos and
labs for Dynamic ARP Inspection,

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including this review.

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I hope this has been
informative for you,

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and I'd like to thank
you for viewing.