310
Chapter 5
IP Routing
5.
What are holddowns used for?
A.
To hold down the protocol from going to the next hop
B.
To prevent regular update messages from reinstating a route that
has gone down
C.
To prevent regular update messages from reinstating a route that
has just come up
D.
To prevent irregular update messages from reinstating a route that
has gone down
6.
What is split horizon?
A.
It causes a router to differentiate which interface a route advertise-
ment is received on and not advertise that information back out the
same interface.
B.
It splits the traffic when you have a large bus (horizon) physical
network.
C.
It holds the regular updates from broadcasting to a downed link.
D.
It prevents regular update messages from reinstating a route that
has gone down.
7.
What is poison reverse?
A.
It sends back the protocol received from a router as a poison pill,
which stops the regular updates.
B.
It is information received from a router that can't be sent back to
the originating router.
C.
It prevents regular update messages from reinstating a route that
has just come up.
D.
It describes when a router sets the metric for a downed link to infinity.
8.
What is the default administrative distance for IGRP?
A.
90
B.
100
C.
120
D.
220
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