A large IPTV service provider primarily uses multicast for delivering IPTV services to its
customers. The service provider delivers digital television channels to home viewers by using a
set-top box as a home appliance and controls this device through its video middleware. Each
video channel uses a unique multicast group address. Recently, some channels have higher
channel change times; to alleviate this problem, a number of solutions were discussed between
the operations and engineering groups. Adding to the complexity of the issue is the fact that the
business has been growing, and the service provider made acquisitions both in its home operating

market and new geographic locations. These changes have made the management of source and
group addresses a major concern. The engineering team thinks that using static joins for popular
channels at the edge routers and moving away from Sparse Mode to SSM-based forwarding will
improve performance issues.
What are two valid concerns for the operations group? (Choose two.)

A.
If SSM is used in the network, the operations team will need to use the rendezvous point for
multicast monitoring.

B.
Replacing a shared multicast tree with SSM offers no security or convergence advantage.

C.
Using DNS-based SSM maps might not be possible.

D.
A mix of static and dynamic joins will make troubleshooting difficult.

E.
Provisioning and managing static joins can increase operational overhead.