H12-221 試験問題を無料オンラインアクセス

The unicast and multicast technologies are both outstanding in solving the problem of "single source, multiple destinations" in order to allow efficient P2MP data transmission.

• A.TRUE
• B.FALSE

Which of the following statements regarding a multicast distribution tree are true? (Select 3 answers)

• A.The PIM-55M protocol can generate only SFTs.
• B.The PIM-DM protocol can generate both RFTs and SFTs.
• C.The PIM-SM protocol can generate both RFTs and SPTs.
• D.Multicast distribution trees are classified into two types: SFT and RPT.

Which statements regarding the local preference attribute are true? (Select 2 answers)

• A.The local preference selects an exit point for data from the local AS
• B.Based on BGP route selection rules, the local preference has a lower priority than the MED attribute which means that BGP compares local preference of routes after comparing ME
• C.Based on BGP route selection rules, the local preference has a lower priority than the preferred-value which means BGP compares local preference of routes after comparing preferred-values.
• D.The local preference of a BGP route is 0 by default.

What are the differences between the IGMP versions 1, 2 & 3? (Select 2 answers)

• A.IGMPv1/v2 do not support the SSM service model but IGMFV3 does.
• B.IGMPv2/v3 members can actively leave groups, whereas in IGMPv1members cannot
• C.IGMPv1/v2 do not support group-specific queries but IGMPv3 does.
• D.IGMPv1/v2 cannot elect devices which may send queries but IGMPv3 can.

Which statement about OSPF is false?

• A.Hello messages are used as a form of greeting to discover other routers on its networks and establish relationships between neighboring devices. On broadcast or NBMA networks, Hello messages can also be used to elect a DR or a BDR.
• B.DD packets contain headers of all LSAs for periodic LSDB synchronization between OSPF neighbors.
• C.The intervals at which two routers send Hello messages must be consistent; otherwise, cannot be established relationships between neighboring devices.
• D.DD packets describe the summary LSDB information by carrying LSA headers.