Review Questions
381
17.
What are two types of shared root tree distributions?
A.
Unidirectional
B.
Unicast
C.
Multidirectional
D.
Bidirectional
18.
What multicast attribute can be applied to multicast router interfaces
to limit the scope of multicast group and data distribution?
A.
TTY
B.
IP access lists
C.
TTL thresholds
D.
Multicast disabled on the router
19.
How does PIM DM differ from PIM SM? (Choose all that apply.)
A.
PIM DM assumes that all PIM neighbors have active members
directly connected and initially forwards multicast data out every
interface.
B.
PIM SM requires an explicit join from a router before the router is
added to the shared tree.
C.
PIM DM is based on a source root tree distribution mechanism.
D.
PIM SM is based on bidirectional shared root tree distribution.
20.
How does CBT differ from PIM SM?
A.
CBT uses unidirectional shared root tree distribution.
B.
CBT uses bidirectional shared root tree distribution.
C.
CBT routers are only included in the tree when there are active
hosts directly connected.
D.
PIM SM uses the unicast route table to verify the RPF.
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