Which two commands are required to enable multicast on a router, knowing that the receivers only supports IGMPv2? (Choose Two)

Question

Options

• AIP PIM RP-address
• BIP PIM ssm
• CIP PIM Sparse-mode
• DIP PIM Passive

• A
  90% (26)
• B
  7% (2)
• D
  3% (1)

Explanation

Sparse mode logic (pull mode) is the opposite of Dense mode logic (push mode), in Dense mode it is supposed that in every network there is someone who is requesting the multicast traffic so PIM-DM routers begin by flooding the multicast traffic out of all their interfaces except those from where a prune message is received to eliminate the "leaf" from the multicasting tree (SPT), the Source-Based Tree (S, G); as opposed to Sparse mode that send the traffic only if someone explicitly requested it. Not like Dense mode, which build a separated source-based tree (S, G) between the source and the requester of the traffic, Sparse mode mechanism is based on a fixed point in the network named Rendez-Vous point. All sources will have to register with the RP to which they send their traffic and thereby build a source-based tree (S, G) between them and the RP (not with the final multicast receiver like in PIM-DM) and all PIM-SM routers, "whatever" multicast traffic they are requesting, have to register with the RP and build a shared-tree (*. G)

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