In Multicast VPN （MVPN） implementations， which two of the following statements are regarding the DefaultMDT Group？（）

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• In relation to MPLS Multicast VPN， which three statements about multicast distribution （MDT） groups aretrue？ （）

  A . Default MDT groups are used for PIM control traffic， low-bandwidth sources， and flooding of sparse mode traffic. B . MDTs are built in customer networks C . Data MDT groups are used for high-bandwidth sources to reduce replication to uninterested PEs. D . MDTs are built in provider networks E . The number of MDTs depends on PIM modes of MDT groups.

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• How are RIP routing contexts implemented in MPLS VPN? （）

  A . RIP does not support routing contexts B . routing contexts are implemented in a single routing process C . routing contexts are implemented using multiple routing processes D . routing contexts are implemented as several instances of a single routing process E . routing contexts are implemented as a single instance of several routing processe

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• 下列哪个VPN不是IMS核心网部分用到的VPN？（）

  A . NGNMGNTVPN B . ITVPN C . NGNVPN D . SoftswitchVPN

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• You work as a network administrator in your company. Communication inside the company is ensured by network environments, such as GET VPN, Dynamic Multipoint VPN and Ethernet. Which PIN architecture is applicable in those environments?（）

  A . Campus B . Teleworker C . Branch D . Data center

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• Which three statements best describe multicast operation on Cisco Nexus switches in a data center？（）

  A .  Cisco NX-OS Software does not support PIM dense mode. B .  The command ip multicast-routing must be enabled in Cisco NX-OS Software before any multicast configuration is possible on the switch. C .  PIM CLI configuration and verification commands are not available until you enable the PIM feature with the feature pim command. D .  Cisco NX-OS Software supports multicast routing per Layer 3 VRF instance. E .  The default PIM operational mode on the Cisco Nexus 7000 switch is SSM.

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• Which two statements are true about RPF checks in MSDP（Multicast Source Discovery Protocol）？（）

  A . It prevents message looping，Session Advertisement（SA）messages must be RPF checked B . RPF check should be done against the route to the Rendez-vous Point of the corresponding PIM-SM domain，which originated the SA C . RPF checking Session Advertisement（SA）messages will cause message looping D . RPF check should be done against the route to the source S of the corresponding PIM-SM domai

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• Cisco IOS XR Software Multicast Routing Implementation， which three features are supported in IPv6 onCisco CRS router？（）

  A . PIM-SSM B . Aggregation multicast C . PIM-Bidirectional D . OOR handling E . integrated multicast F . Multicast NSF

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• In PIM-SM operations， the first router connected to the multicast source sends the Register message towhich device？（）

  A . Multicast source B . Multicast receiver C . RP D . RP mapping agent E . Designated Router （DR）

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• Which statement about multicast VPN is true？（）

  A . The MDT group address should be the same for both address families in the same VRF B . The MDT group address should be the same for both address families in the different VRFs C . Configuration of the MDT source on a pre-VRF basis is supported only on IPv6 D . The MDT group address should be different for both address families in the same VRF

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• In PIM-SM what control plane signaling must a multicast source perform before it begins to send multicasttraffic to a group？（）

  A . The source must send a PIM Register message to the rendezvous point （RP）. B . The source must first join the multicast group using IGMP before sending. C . The source must perform a Request to Send （RTS） and Clear to Send （CTS） handshake with the  PIM designated router （DR）. D . No control plane signaling needs to be performed； the source can simply begin sending on the local subnet.

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• What is the purpose of IGMP in a multicast implementation?（）

  A . it is not used in multicast B . it determines the virtual address group for a multicast destination C . it dynamically registers individual hosts in a multicast group on a specific LAN D . it is used on WAN connections to determine the maximum bandwidth of a connection E . it determines whether Bidirectional PIM or PIM sparse mode will be used for a multicast flow

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• You work as a network technician at Company. Your boss， Mrs.   ， is interested in   GLBP. In particular， she wants to know the multicast address that this protocol uses.  What should  you tell her？ （）

  A .  224.0.0.100 B .  224.0.0.1 C .  224.0.0.102 D .  224.0.0.10 E .  224.0.0.101 F .  None of the other alternatives apply

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• Which two data intergrity algorithms are commonly used in VPN solutions?（）

  A . HMAC-MD5 B . RSA C . HMAC-SHA-1 D . DH1 E . DH2

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• Which two statements are true about the rendezvo us point (RP) in a multicast network?（）

  A . The multicast sources must register with the RP to form the multicast distribution tree. B . An RP is required only in networks running Protocol Independent Multicast dense mode (PIM DM). C . The mu lticast receivers must register with the RP to form the multicast distribution tree. D . An RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM). E . An RP is required only in networks running Protocol Independent Mu lticast sparse - dense mode (PIM - SDM). F . To form the multicast distribution tree, the multicast sources register with and the receivers join the RP.

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• What is the purpose of IGMP in a multicast implementation？（）

  A .  it is not used in multicast B .  it determines the virtual address group for a multicast destination C .  it dynamically registers individual hosts in a multicast group on a specific LAN D .  it is used on WAN connections to determine the maximum bandwidth of a connection E .  it determines whether Bidirectional PIM or PIM sparse mode will be used for a multicast flow

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• How is RPF used in multicast routing？（）

  A . to prevent multicast packets from looping B . to prevent PIM packets from looping C . to instruct PIM where to send a （*， G） or （S， G） join message D . to prevent multicast packets from looping and to instruct PIM where to send a （*， G） or （S， G） joinmessage

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• Which two statements are correct with regard to route distinguisher as defined in RFC 4364-AKA IP-VPN（MPLS-VPN）？（）

  A . The configuration to define Route-Distinguisher is Ip vrf bulle Rd 1：1 B . A route distinguisher can be imported and exported to and from a VRF C . Route-Distinguisher is an 8 byte BGP attribute value used in influencing BGP best path algorithm. D . Route-Distinguisher is an 8 byte value used in creating unique VPNv4 address.

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• What is the minimum configuration you must do in order to enable multicast support on the CiscoWireless LAN Controller v5.2?（）

  A . Enable the IGMP snooping capability and define the IGMP timeout period. B . Set the Ethernet multicast mode to Enabled， enable the IGMP snooping capability， and define the IGMP timeout period. C . Set the multicast monitor function to Enabled， enable the IGMP snooping capability， and define the mandatory data rate to the minimum value supported. D . Set the Ethernet multicast mode to Multicast and define the multicast group address.

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• In PIM-SM operations，to which device does the first router that connects with the multicast source sendthe register message？（）

  A . RP B . multicast source C . IGMP router D . multicast receiver E . PIM designated router

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• Select two valid administratively scoped multicast addresses in networks running Interior Gatewayprotocols like EIGRP and OSPF？（）

  A . 239.0.0.1 B . 239.255.255.255 C . 224.0.0.10 D . 224.0.0.5

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  A. block B. crush C. group D. jam

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• InMulticastVPN（MVPN）implementations，whichtwoofthefollowingstatementsareregardingtheDefaultMDTGroup？（）

  A.ItisusedforPIMcontroltraffic B.Itisoptionallyconfiguredforahighbandwidthmulticastsourcetoreducemulticasttrafficreplication to uninterestedPErouters C.WithintheVPFconfigurationinthePErouter，multipleDefaultMDTgroupsareconfiguredsoeach VPFcansupportmultiplemulticastsources D.ThereisareducedmulticaststateintheMPLScoreProuters E.Whenmulticasttrafficexceedsacertainconfiguredthreshold，trafficfromtheDataMDTisswitched to theDefaultMDTtoconservebandwidth

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• How many liaisons of sound are there in the sentence 'Im an English boy'

  A．one B．two C．three D．four

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