What must be enabled on the interface of a multicast-enabled device to support the Source Specific Multicast feature?
A. IGMP version 3
B. IGMP version 2
C. IGMP version 1
D. PIM
Answer:A
What must be enabled on the interface of a multicast-enabled device to support the Source Specific Multicast feature?
A. IGMP version 3 B. IGMP version 2 C. IGMP version 1 D. PIM
Explanation: IGMP is the Internet Engineering Task Force (IETF) standards track protocol used for hosts to signal multicast group membership to routers. Version 3 of this protocol supports source filtering, which is required for SSM. To run SSM with IGMPv3, SSM must be supported in the Cisco IOS router, the host where the application is running, and the application itself. IGMP v3lite and URD are two Ciscodeveloped transition solutions that enable the immediate development and deployment of SSM