[AUDIO LOGO]
Congratulations on completing another skill.
Now it's time for a review in the form of a quiz.
So let's go ahead and jump in with our first question.
What are the two types of RTBH?
So hopefully, we remember that RTBH is your remote triggered
black hole filtering.
And the two types of that are destination-based.
This is going to filter the traffic
based on where it's going.
And source-based, which is, of course,
going to filter based on where the traffic is coming from.
So that means that for this question, our two
correct answers are 2 and 4.
Next question.
When you enable TTL security, all BGP packets
are then sent with a TTL of--
So hopefully, we remember how TTL security works.
It sends all of the BGP packets with the maximum TTL.
And then there's a TTL on the receiving side
that's acting as a minimum threshold.
Well, the maximum value for the TTL is 255.
So in this case, that would make 3 the correct answer.
Final question.
What is the default behavior of route
limiting when the maximum is exceeded?
So for this one, let's just go down our list.
Our first answer is to discard any routes
in excess of the maximum.
Now that actually doesn't sound like a bad answer.
However, that's not one of our choices.
Discarding routes is not one of the things
that route limiting does.
Number 2, just send a syslog notification.
Well, this also is not correct simply because it
says the default behavior.
Can we have it just send a syslog notification?
Yes.
If we add the warning only option,
then 2 is exactly what it would do.
But that's not the default behavior.
Number 3, take the neighbor down.
That actually is what it does.
It sends a BGP notification, shuts down the neighborship.
Now we also have an option to have it automatically restart
after a certain amount of time.
But that wouldn't really change the answer to this question,
whether we configure it to restart or not.
And number 4 is to reload the linecard connected
to the neighbor.
This is just simply incorrect.
So number 3 would be our correct answer for this question.
So that concludes this quiz.
If you find that you are missing any of the information needed
to answer these questions, I would
encourage you to go back and review the sources referenced
on each question.
Otherwise, congratulations on completing
implementing BGP security.
I hope this has been informative for you.
And I'd like to thank you for viewing.