多项选择题

Refer to the exhibit. Which two conclusions can be drawn from the debug ip igmp output?（）

A. The router sent an IGMP version 2 query out interface Ethernet1 at multicast address 224.0.0.1.
B. Router RTA received an IGMP report version 1 from host 192.168.9.1.
C. Reverse Path Forwarding (RPF) is ena bled for 192.168.9.4.
D. Reverse Path Forwarding (RPF) is enabled for 224.0.1.40.
E. The IP multicast groups are 224.0.0.1, 224.0.1.40, and 239.255.0.1.
F. IP PIM RP mapping is static.

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多项选择题

What are three methods that may be use d to allow a switch to determine which ports to forward IP multicast messages to?（）

A. IGMP
B. IGMP snooping
C. PIM
D. CGMP
E. static assignment
F. CDP

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Which two multicast protocol statements are true?（）

A. Sparse mode multicast uses a pull model to send multicast traffic to where it is requested
B. Dense mode multicast uses a push model to flood traffic throughout the network and then prunes the unwanted traffic
C. Dense mode multicast requires explicit join messa ges from their members
D. Sparse mode uses reverse path forwarding (RPF) to prune off redundant flows
E. The primary use of sparse mode multicast is for test labs and router performance testing

多项选择题

Which two statements are tru e about the rendezvous point (RP) in a multicast network?（）

A. The multicast sources must register with the RP to form the multicast distribution tree
B. An RP is required only in networks running Protocol Independent Multicast dense mode ( PIM DM)
C. The multicast receivers must register with the RP to form the multicast distribution tree
D. An RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM)
E. An RP is required only in networks running Pro tocol Independent Multicast sparse - dense mode (PIM - SDM)
F. To form the multicast distribution tree, the multicast sources register with and the receivers join the RP