The HW equipment network administrator plans to migrate IGMPv2 to IGMPv3 in the multicast netbook. Compared with IGMPv2, what are the improvements of IGMPv3? (Multiple choice)

• A.IGMPV3 adds the function of specifying a multicast group that does not join a specific multicast source for the host
• B.IGMPv3 removed in a wildcard multicast group join all source functions
• C.IGMPV3 adds Request-to-send ) d and Clear-to-send between source and local IGMP querier
• D.IGMPv3 removes the Report-suppression function for membership reports
• E.IGMPV3 adds the function of specifying the host to join a specific multicast source

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The topology of a multi-protocol network is shown in the figure. Please study the topology carefully. The router (in Area1) imports the routes learned through BGP into the OSPF process. Then, what types of LSAs will R3 generate to advertise to area 0?

• A.Type 1 LSA
• B.Type 7 LSA
• C.Class 2 LAS
• D.Type 5 LSA
• E.Type 4 LSA

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Which of the following description of TTL in MPLS Header is correct?

• A.Used to control the upstream equipment during label distribution
• B.TTL similar to the IP header, used to prevent packet loops
• C.To control the distribution of labels
• D.Restrictions on LSR

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Which of the following description is wrong about the MPLS BGP VPN?

• A.IBGP establishes a stable BGP neighbor relationship for the ARPback interface address.
• B.Route switching between PE and CE can be static route, OSPF multi-instance, IS-iS multi-instance, EBGP.
• C.The TTL field in the tag has the effect of preventing loops.
• D.BGP Soo is used to prevent routes routed from a VPN site from going back to the site through the MPLS backbone. Soo is an extended community attribute automatically generated by MP-BGP.

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Regarding Multi-VPN-Instance CE (MCE), which one of the following descriptions is wrong?

• A.Users connected to the same MCE but not belonging to a VPN instance cannot access each other
• B.Devices with MCE function can access multiple VPN instances in BGP/MPLS IP VPN applications, reducing user investment in network equipment
• C.There must be multiple physical links between MCE and PE to achieve isolation between different VPN instances
• D.On the MCE device, you need to create separate routing and forwarding tables for different VPNs, and bind them to the corresponding interfaces

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