4A0-108 試験問題を無料オンラインアクセス

Refer to the configuration exhibit.

Channel 239.1.1.11239.1.1.2, 239.1.1.3 and 239.1.1.5 have already been established.
What will happen when this router receives a IGMP report to join group 239.1.1.6?

• A.No existing channel will be torn down and the new channel for 239.1.1.6 will be established as there is enough resource
• B.The router will tear down either channel 239.1.1.1 or 239.1.1.2 as they are low class and establish a new channel for 239.1.1.6
• C.The new channel 239.1.1.6 won't be established and a log will be generated
• D.The router will tear down channel 239.1.1.3 as it's non-mandatory and establish a new channel for 239.1.1.6

Which of the following PIM messages is sent to RP via unicast?

• A.(*, G) Join/Prune
• B.(S, G) Join/Prune
• C.Register
• D.Candidate-RP-Advertisement

Which of the following is NOT a benefit of anycast RP?

• A.It supports more optimal routing of the Shared Path Tree by allowing redundant RPs to be located closer to receivers.
• B.It supports a different multicast topology than the unicast topology.
• C.It provides load balancing between multiple RPs in the network,
• D.It provides RP redundancy in a PIM SM network.

Which of the following statements about Mrouter port is false?

• A.Mrouter port is indicated by (**) entry in the MFIB
• B.A port on which any type of IGMP message is received will be set as an mrouter port
• C.Mrouter port can be configured manually
• D.IGMP reports will only be forwarded out of mrouter ports once igmp-snooping is enabled in the vpls service

An Alcatel-Lucent 7750 SR is unable to locate a multicast source address in the multicast routing table. However, the source address is available in the unicast routing table. Which statement best describes the default RPF check behavior of the Alcatel-Lucent 7750 SR?

• A.The RPF check succeeds, as PIM uses the multicast routing table first, and then the unicast routing table by default.
• B.The RPF check succeeds, as PIM uses only the unicast routing table by default.
• C.The RPF check fails, as it requires the source address be present in both the unicast and multicast routing tables.
• D.The RPF check fails, as PIM relies exclusively on the multicast routing table by default.