Which two statements about ASM and SSM are correct? (Choose two.)
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A. B. C. D. E.Explanation.
ASM and SSM are two different multicast delivery modes in PIM (Protocol Independent Multicast) protocol. Here are the correct statements about ASM and SSM:
A. By default, the SSM group range for PIM is 232.0.0.0/8 and for PIM6 is FF3x/96. This statement is correct. SSM (Source-Specific Multicast) is a multicast delivery model that uses source-specific multicast groups. By default, the SSM group range for PIM is 232.0.0.0/8 and for PIM6 is FF3x/96. However, you can configure a different range of SSM groups if needed.
B. PIM ASM is not fully supported on a vP. This statement is also correct. PIM ASM (Any-Source Multicast) is a multicast delivery model that uses a shared tree for delivery. vP (virtual PortChannel) is a technology that allows you to bundle physical links into a single logical link. PIM ASM is not fully supported on a vP, as it requires certain hardware functionalities that may not be available on a vP.
C. In ASM mode, only the last-hop router switches from the shared tree to the SPT. This statement is not correct. In PIM ASM mode, all routers switch from the shared tree to the shortest-path tree (SPT) when they receive a multicast data packet for a source. This is because PIM ASM creates a shared tree for a multicast group, and then switches to the SPT when the first packet arrives from a source.
D. RP configuration is not required in the ASM mode. This statement is not correct. RP (Rendezvous Point) is a key component of PIM ASM mode. RP is responsible for receiving multicast traffic from sources and forwarding it to multicast receivers. Therefore, RP configuration is required in the ASM mode.
E. If you want to use the default SSM group range, you must configure the SSM group range. This statement is not correct. By default, the SSM group range for PIM is 232.0.0.0/8 and for PIM6 is FF3x/96, and you do not need to configure it if you want to use the default range. However, if you want to use a different range of SSM groups, you must configure it.