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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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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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Define the following terms--

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P space and Q space.

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These being
fill-in-the-blank answers,

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we're simply looking for
something similar to these

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answers.

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The P space is the
set of nodes that

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are reachable without
using the protected link.

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So keep in mind that this
would be from the perspective

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of the point of local repair.

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The Q space, on
the other hand, is

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the set of nodes
that can actually

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reach the destination--

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still, of course, without
using the protected link.

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So, again, the P
space are the nodes

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that are reachable from
the point of local repair,

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and the Q space
are the nodes that

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can reach the
destination, both of which

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without using the link that
we're trying to protect.

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Next question, which of
the following protocols

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are used for the control
plane in segment routing?

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So if we go down our list,
the first one is OSPF,

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and this is correct.

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OSPF will function
as the control

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plane for segment routing.

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Next is RSVP.

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RSVP is actually
one of the protocols

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that we're going to be getting
rid of in segment routing,

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so that's not going to be
one of our correct choices.

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IS-IS, of course, can
be used instead of OSPF,

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so that is an acceptable choice.

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We can also use BGP.

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Again, this is normally
done between domains,

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but it can be used
in any situation.

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And, finally, LDP, this
is the other protocol

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that we're eliminating by
going to segment routing.

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So our correct choices here
are going to be 1, 3, and 4.

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Final question,
which LSA type is

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used for distributing segment
routing labels when using OSPF?

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So this one is really just
a matter of memorization,

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so you have to just
sort of remember

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that we're going to be
using type 10 opaque LSAs.

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So that makes 6
our correct answer.

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Now, keep in mind, there are
subtypes that are used here,

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and we will see that more
in an upcoming skill.

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But overall, they are
type 10 opaque LSAs.

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So that concludes this quiz.

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If you find you are missing
any of the information

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to answer these
questions, I would

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encourage you to review
the referenced sources

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on each question.

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Otherwise, congratulations on
completing Discovering Segment

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Routing.

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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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