Which statement about Cisco ASA multicast routing support is true?
A.
The Cisco ASA appliance supports PIM dense mode, sparse mode, and BIDIR-PIM.
B.
The Cisco ASA appliance supports only stub multicast routing by forwarding IGMP messages from multicast receivers to the upstream multicast router.
C.
The Cisco ASA appliance supports DVMRP and PIM.
D.
The Cisco ASA appliance supports either stub multicast routing or PIM, but both cannot be enabled at the same time.
E.
The Cisco ASA appliance supports only IGMP v1.
Explanation:
http://www.cisco.com/en/US/docs/security/asa/asa82/configuration/guide/route_multicast.html# wp1060775
Multicast routing is a bandwidth-conserving technology that reduces traffic by simultaneously delivering a single stream of information to thousands of corporate
recipients and homes. Applications that take advantage of multicast routing include videoconferencing, corporate communications, distance learning, and
distribution of software, stock quotes, and news. Multicast routing protocols delivers source traffic to multiple receivers without adding any additional burden on the
source or the receivers while using the least network bandwidth of any competing technology. Multicast packets are replicated in the network by Cisco routers
enabled with Protocol Independent Multicast (PIM) and other supporting multicast protocols resulting in the most efficient delivery of data to multiple receivers
possible. The ASA supports both stub multicast routing and PIM multicast routing. However, you cannot configure both concurrently on a single ASA.