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[AUDIO LOGO]

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Congratulations on
completing another skill.

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Now, it's time for a review
in the form of a quiz.

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So let's go ahead and jump
in with our first question.

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Which of the following
is a design goal

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of BGP route dampening?

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So let's go down our list and
see which ones make sense.

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So number 1 says to reduce
router processing load caused

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by large BGP tables.

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Well, unfortunately,
route dampening

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isn't about large BGP tables,
it's about routes flapping.

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Now, a large BGP table may
make that problem worse,

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but that's not the
fundamental problem

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that route dampening is fixing.

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So that would make 1
an incorrect answer.

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Number 2, minimize eBGP update
processing on the internet

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by suppressing customer routes.

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Well, we may suppress
customer routes

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as part of route dampening,
but generally speaking, that's

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not the idea.

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We're going to go
after routes that

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are actually causing a problem.

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So 2, in general,
although again it

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may be customer routes
that get suppressed,

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that's not our actual goal.

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Next, suppress routes
that are likely to flap

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based on their history.

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That's the one
we're looking for.

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We're looking for routes
that are misbehaving,

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that have already proven
that they're being advertised

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and then retracted and
then advertised many times

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in a short period of time.

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And that also brings
us to the last point

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that we're not
suppressing routes

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that just flap occasionally.

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It's going to be
routes that have

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a history of flapping
again numerous times

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in a short period of time.

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So for this question, the
answer is going to be number 3.

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Next question, we have
a fill in the blank.

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What is BGP Prefix Independent
Convergence or PIC?

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Now, as always, with fill
in the blank questions,

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there's a couple of
ways we could word this.

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But as long as you
get the general idea,

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it's BGP storing a
backup path in the BGP

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table, the routing table,
and the forwarding table.

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The idea is it can
be used immediately

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in the event of a
detected failure.

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Again, this is very
similar to what

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OSPF does with fast
reroute and what EIGRP does

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with its feasible successor.

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So that concludes this quiz.

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If you find that you are
missing any of the information

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to answer these
questions, I would

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encourage you to go back and
review the sources referenced

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on the questions.

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Otherwise, congratulations on
completing Implementing BGP

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Advanced Features.

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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.

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