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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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What is the hash
mask for in BSR?

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So let's just go ahead
and go down the list.

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Number one, provides the
subnet mask for the RP.

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Well, that's definitely
going to be wrong.

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We don't even care what
the subnet mask for the RP

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is, whatever exactly that means.

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I guess that would
mean the subnet mask

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for the RP's IP address, that
doesn't really mean much.

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Matches on the mask of
the multicast group.

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That sounds completely
made up nonsense.

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There is no mask for
a multicast group.

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So number two would
definitely be incorrect.

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Number three, allows for
group-based load sharing.

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Well, that does, in
fact, sound like what

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the hash mask is for in BSR.

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Let's just make sure that
number four is also not correct.

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Number four says, allows
for RP-based load sharing.

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That's actually
not what it does.

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It does the group-based
load sharing,

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making answer three
our correct answer.

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Next question--
which combination

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would provide the most robust
load sharing for the RP?

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So of course, the
key factor here

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is going to be the most
robust, which would generally

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mean the one that's
going to load share

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the best or in the most ways.

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So let's go ahead and
take a look at our list.

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First, I'm going to jump right
to number 4, and just say no,

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not all load-sharing is equal.

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That is just
completely not correct.

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So let's skip over that.

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Then the rest of our choices
here all involve using anycast.

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That's always a good way to go.

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From a load-sharing
perspective, anycast

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gives us geographical
load sharing

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because we're going
to go to the closest

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instance of that address.

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So it's going to be
one of these choices.

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However, if we look over
the rest of these options,

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static mapping is not going
to be a great choice here

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because that's not going
to do any load-sharing

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in and of itself.

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Again, we did mention you could
do some manual load sharing,

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but it's not going
to do any on its own.

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And we could say the
same thing about auto-RP.

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That would leave number
of our list as well.

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Auto-RP doesn't do
load sharing any better

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than static mapping would.

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Again, we can do
some manual options.

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However, BSR does have the
option to change the hash mask.

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And although we didn't look
at that in great detail,

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we did discuss
that that allows us

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to do group-based load sharing.

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So if you do group based load
sharing with geographical load

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sharing, that's going to be the
most robust load sharing option

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we have available.

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So I would consider number
two to be our correct answer--

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using Anycast RP with BSR.

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Final question-- which of
the following dynamic options

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to choose the RP is
available in PIM version 1?

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Well, to an extent, this is
just a matter of memorization,

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but there's only
two dynamic options

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to choose on this
list to begin with--

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auto-RP and BSR.

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So right away anycast
goes off, that's again,

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more of a way of running the
RP, that's not a dynamic way

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to find the RP.

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Dynamic RP is just
a made up word,

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that's not actually a thing.

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So it really comes down
to BSR versus auto-RP,

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and hopefully we all
remember that BSR actually

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requires PIM version 2.

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Therefore, auto-RP, which
is Cisco proprietary

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is the only one available
in PIM version 1.

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Now, on this one, we did
have to hide the source there

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for just a moment, otherwise
exploring auto-RP there

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as the source might have
given away the answer,

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but that is the source
for this question.

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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 referenced sources

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on each question.

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Otherwise, congratulations on
completing discovering the RP.

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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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