CCIE Theory Implementing Multicast
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| Which two of these statements correctly describe classic PIM-SM? | 1 The IOS default is for a last-hop router to trigger a switch to the shortest path tree as soon as a new source is detected on the shared tree.
2 The default behavior can be disabled by setting the value in the IP PIM SPT-threshold command to "infinity"
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| Which is the default behavior of PIM-SSM. If there are multiple equal-cost paths to the multicast source? | it will send the join only to the neighbor with the highest IP address
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| In PIM-SM what control plane signing must a multicast source perform before it begins to send multicast traffic to a group? | No control plane signing needs to be performed, the source can simply begin sending on the local subnet.
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| Which command is used to enable SSM with the range 232.0.0.0/8? | ip pim ssm default
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| Which two are differences between IGMPv2 and IGMPv3 reports? | 1 IGMPv3 adds the ability to include or exclude source lists
2 Only IGMPv3 reports may contain multiple group state records
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| In which two scenarios would MSDP be used? | 1 Interdomain multicast
2 Anycast RP
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| What is the value in seconds of the "Max Response Time" in an IGMPv2 report message? | 0
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| Which statement is correct in reference to IPv6 multicast? | IPv6 multicast requires MSDP
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| What is Phantom RP used for? | it is used for redundancy in bidirectional PIM
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| What does the command ip pim send-ip-discovery scope 16 achieve? | It makes the router an Auto-RP mapping agent.
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| Which statement is true of a source that wants to transmit multicast traffic to a group 239.1.1.1 | It may transmit multicast traffic to the group at any time
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| Which of these statements about PIM join messages in classic PIM-SM is correct? | PIM join messages are sent every 60 seconds to refresh the upstream router's mroute state for the multicast tree
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| Which value is used in the PIM type field to indicate a register message? | 1
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| Refer to the exhibit: ip pim ssm range ssm-groups ip access-list standard ssm-groups permit 232.0.0.0 0.255.255.255 Which is correct? | Group 232.1.1.1 will be in SSM mode because of the access-list ssm-groups
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| Which multicast address is reserved for cisco-rp-announce? | 224.0.1.39
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| Which two multicast address ranges are assigned as source-specific multicast destination addresses and are reserved for use by source-specific applications and protocols? | 1 232.0.0.0/8
2 FF3x::/32
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| Which command is used to enable SSM with the range 232.0.0.0 - 255.0.0.0 | ip pim ssm
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| What does the beginning of a multicast address look like, if it is used for embedded RP? | FF7
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| Refer to the exhibit: shoe ip mfib 239.1.1.1 10.1.100.3 (10.1.100.3),239.1.1.1) Flags: sw Forwarding: 74326/0/81/0, other: 0/0/0 Ethernet0/1 Flags: A Etherent1/0 Flags: F NS pkts: 23/0 Which statement is correct? | Ehthernet1/0 is the outgoing interface list, and Ethernet0/1 is in the incoming interface list
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| Which command can be used to check the assignment of RPs to multicast groups? | show ip pim rp mapping
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| Which two commands are required to enable multicast on a router, knowing that the receivers only support IGMPv2? | 1 ip pim rp-address
2 ip pim sparse-mode
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| What is the Internet protocol number for all PIM control messages? | 103
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| What three statements are true about Source Specific Multicast? | 1 Is best suited for applications that are in the one-to-many category
2 SSM uses shortest path trees only
3 There are no RPs to worry about
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| Which value is used in the PIM TYPE field to indicate a register-stop message? | 2
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| Which two statements about SA caching are true? | 1 Caching allows pacing of MSDP messages
2 Caching reduces join latency
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| show ip mroute (*,239.1.1.1) What does the incoming interface of the above(*,G) entry indicate? | The interface closest to the RP, according to the unicast routing table.
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| What value is used in the PIM TYPE field to indicate a join/Prune message? | 3
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| Which three messages types are valid PIMv2 message types? | 1 Register
2 Register-stop
3 Join/Prune
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| Which type of domains is interconnected using Multicast Source Discovery Protocol? | PIM-SM
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| exhibit: show ipv6 mroute (*,FF04::10), 00:00:46/never, RP 2001:DB8:5::5, flags: SPC incoming interface : Gigabitethernet0/0 RPF nbr: FE80::216:47FF:FFBB:FF0 IPv6 multicast configured between R5 and R6. Which two statements are true based on output | The multicast group address is FF04::1 0
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| Which multicast address is reserved fir cisco-rp-discovery? | 224.0.1.40
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| The ip pim autorp listener command is used to do which of these? | allow Auto-RP packets in group 224.0.1.39 and 224.0.1.240 to be flooded in dense mode out interfaces configured with the ip pim sparce-mode command
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| Which message type is constructed and sent from an MSDP router to its MSDP peers when it receives a PIM register message (knowing that the MSDP router is also configured as an RP for the domain)? | Source-Active message
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| Which IPv6 multicast address is received for use by all PIM routers? | FF02::d
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| In order to configure two routers as anycast RPs, which of these requirements, af a minimum, must be satisfied? | Multicast Source Discovery Protocol must be configured between the two anycast RPs
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| apart from interdomain multicast routing, what else is MSDP used for? | Anycast RP
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| Which RFC number contains the specification for Protocol Independent Multicast sparse mode? | 4601
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| since enabling multicast, the network monitoring tools show periodic spikes in link utilization throughout the network, even in areas where the video application is not being used. What could be a possible cause? | PIM dense mode is being used
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| Which two are differences between IGMpv2 and IGMPv3 reports? | 1 IGMPv3 has the ability to include or exclude source lists
2 all IGMPv3 hosts send reports to destination address 224.0.0.22
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| Choose two commands that are required to enable multicast on a router, when it is known that the receivers use a specific functionality of IGMPv3? | 1 ip pim ssm
2 ip pim sparse-mode
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| which IGMPv2 message contains a non-zero "Max Response Time"? | Membership Query
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| How is RPF used in multicast routing? | to prevent multicast packets from looping and to instruct PIM where to send a (*,G) or (S,G) join message
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| Which two multicast addresses are reserved for use by ALL-PIM-ROUTES? | 1 224.0.0.13
2 FF02::d
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