Configure or Monitor IGMP, PIM Dense Mode, or PIM Sparse Mode with Multicast Routing Policy JN0-664 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A service provider is deploying multicast for a financial trading application. The receivers are configured to use IGMPv3 to request specific sources. The network team wants to ensure that only the approved sources are accepted and all other sources are ignored. Which configuration approach should be used on the Junos router?

   • AConfigure IGMPv2 on the interfaces and use a static multicast route for the approved sources.
   • BConfigure IGMPv3 on the interfaces and apply a multicast routing policy that filters the source address.
   • CConfigure a static IGMP group membership for the approved sources.
   • DEnable PIM dense mode on the interfaces to flood all sources and rely on the receivers to filter.
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A network administrator is verifying the operation of PIM dense mode on a Junos router. The administrator wants to confirm that the router is sending and receiving PIM hello messages on a specific interface. Which command should be used?

   • Ashow igmp groups
   • Bshow pim interfaces
   • Cshow multicast route
   • Dshow pim neighbors
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A network engineer is troubleshooting why a host on a directly connected segment is not receiving multicast traffic for group 239.1.1.1. The host has sent IGMP membership reports, and the router's IGMP group table shows the group. However, the multicast route (mroute) for the group is not present. What is the most likely cause?

   • AThe IGMP version on the router is set to v3, but the host is using v2.
   • BThe host is not sending IGMP membership reports.
   • CThe multicast group is outside the configured SSM range.
   • DThe multicast routing protocol (PIM) is not enabled on the interface.
   Reveal Solution Discussion Select an answer first
5. 9foundation · easy

   Which command would you use to trace PIM protocol events on a Junos router?

   • Aset protocols pim traceoptions file pim-log
   • Bset routing-options traceoptions file routing-log
   • Cset protocols pim log file pim-log
   • Dset protocols igmp traceoptions file igmp-log
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6. 10foundation · easy

   What is the default behavior of PIM dense mode when a new multicast source starts transmitting?

   • AThe router floods multicast traffic to all PIM neighbors and then prunes branches with no receivers.
   • BThe router sends a prune message to all neighbors to stop unwanted traffic.
   • CThe router forwards traffic only to directly connected receivers that have sent IGMP reports.
   • DThe router sends a join message to the rendezvous point (RP) to request the traffic.
   Reveal Solution Discussion Select an answer first