[AUDIO LOGO]
Congratulations on completing another skill.
Now, it's time for a review in the form of a quiz.
As we go through these questions,
be sure to pause the video after each question to give yourself
the opportunity to answer the question yourself
before we then go over the answer.
That said, let's jump in with our first question.
What is the hash mask for in BSR?
So let's just go ahead and go down the list.
Number one, provides the subnet mask for the RP.
Well, that's definitely going to be wrong.
We don't even care what the subnet mask for the RP
is, whatever exactly that means.
I guess that would mean the subnet mask
for the RP's IP address, that doesn't really mean much.
Matches on the mask of the multicast group.
That sounds completely made up nonsense.
There is no mask for a multicast group.
So number two would definitely be incorrect.
Number three, allows for group-based load sharing.
Well, that does, in fact, sound like what
the hash mask is for in BSR.
Let's just make sure that number four is also not correct.
Number four says, allows for RP-based load sharing.
That's actually not what it does.
It does the group-based load sharing,
making answer three our correct answer.
Next question-- which combination
would provide the most robust load sharing for the RP?
So of course, the key factor here
is going to be the most robust, which would generally
mean the one that's going to load share
the best or in the most ways.
So let's go ahead and take a look at our list.
First, I'm going to jump right to number 4, and just say no,
not all load-sharing is equal.
That is just completely not correct.
So let's skip over that.
Then the rest of our choices here all involve using anycast.
That's always a good way to go.
From a load-sharing perspective, anycast
gives us geographical load sharing
because we're going to go to the closest
instance of that address.
So it's going to be one of these choices.
However, if we look over the rest of these options,
static mapping is not going to be a great choice here
because that's not going to do any load-sharing
in and of itself.
Again, we did mention you could do some manual load sharing,
but it's not going to do any on its own.
And we could say the same thing about auto-RP.
That would leave number of our list as well.
Auto-RP doesn't do load sharing any better
than static mapping would.
Again, we can do some manual options.
However, BSR does have the option to change the hash mask.
And although we didn't look at that in great detail,
we did discuss that that allows us
to do group-based load sharing.
So if you do group based load sharing with geographical load
sharing, that's going to be the most robust load sharing option
we have available.
So I would consider number two to be our correct answer--
using Anycast RP with BSR.
Final question-- which of the following dynamic options
to choose the RP is available in PIM version 1?
Well, to an extent, this is just a matter of memorization,
but there's only two dynamic options
to choose on this list to begin with--
auto-RP and BSR.
So right away anycast goes off, that's again,
more of a way of running the RP, that's not a dynamic way
to find the RP.
Dynamic RP is just a made up word,
that's not actually a thing.
So it really comes down to BSR versus auto-RP,
and hopefully we all remember that BSR actually
requires PIM version 2.
Therefore, auto-RP, which is Cisco proprietary
is the only one available in PIM version 1.
Now, on this one, we did have to hide the source there
for just a moment, otherwise exploring auto-RP there
as the source might have given away the answer,
but that is the source for this question.
So that concludes this quiz.
If you find that you are missing any of the information
to answer these questions, I would
encourage you to go back and review the referenced sources
on each question.
Otherwise, congratulations on completing discovering the RP.
I hope this has been informative for you,
and I'd like to thank you for viewing.