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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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As we go through
these questions,

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be sure to pause the video after
each question to give yourself

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the opportunity to answer
the question yourself

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before we then go
over the answer.

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That said, let's jump in
with our first question.

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Why is MPLS TE
required for SR-TE?

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This of course, is a fill
in the blank question

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so as long as we have something
along the lines of this answer,

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it would be correct.

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And the answer is quite simply
because MPLS is still the data

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plane for segment routing.

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Remember that segment routing
is effectively just changing out

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the control plane and
implementing a little bit

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of different logic.

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But we're still
using MPLS labels

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in the data plane for
our traffic forwarding.

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So we still need
our devices to be

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capable of doing MPLS traffic
engineering to support SR-TE.

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Next question.

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Which command is used
to get link state

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information from the IGP
into multiprotocol BGP?

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So this one's really just
a matter of memorization.

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There's not too much to say
about the incorrect answers.

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So in this case, the correct
answer is number 3, distribute.

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One other thing I
would say is don't

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confuse this with
redistribute which

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is for getting routes between
different routing protocols.

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So there are two
different commands

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and the one we use for link
state information is distribute

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so that makes 3
our correct answer.

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Final question.

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How do we get the BGP routes to
be used in multi-domain SR-TE?

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So if you remember
the problem was

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that BGP would
not use the routes

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because it saw the next
hop as being unreachable.

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So if we look over
these answers,

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they all start with
creating a static route.

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So it's really just a
static route to what

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and we just said it because
the problem is next hop

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reachability.

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So we create a static
route to the BGP next hop,

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pointing to Null0 simply
to trick, if you will,

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BGP into using a route that
it normally would think

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the next hop is not reachable.

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So that makes 3
our correct answer.

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So that concludes this quiz.

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If you feel that you are missing
any of the information needed

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to answer these
questions, I would

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encourage you to review
the sources referenced

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on each question.

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Otherwise, congratulations
on completing implementing

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segment routing TE.

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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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