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Give me a D. Give me a A.
Give me an I. What do you get?

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[MUSIC PLAYING]

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Dynamic ARP Inspection.

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The way to spoof or trick a
network based on bogus ARP

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messages is a huge problem.

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And that's why
there is a benefit

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of having a device like
a catalyst switch that

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can support the
function of protecting

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against those types of attacks.

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So what you and I get to
do in this set of videos,

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is we are going to understand,
configure, and verify

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this feature called
Dynamic ARP Inspection,
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X-TIMESTAMP-MAP=LOCAL:00:00:00.000,MPEGTS:900000

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this feature called
Dynamic ARP Inspection,

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to protect our networks
against bogus and malicious ARP

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messages.

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Let's begin.