In Multicast VPN （MVPN） implementations， which two of the following statements are regarding the DefaultMDT Group？（）A、It is used for PIM control trafficB、It is optionally configured for a high bandwidth multicast source to reduce multicast traffic replication to uninterested PE routersC、Within the VPF configuration in the PE router， multiple Default MDT groups are configured so each VPF can support multiple multicast sourcesD、There is a reduced multicast state in the MPLS core P routersE、When multicast traffic exceeds a certain configured threshold， traffic from the Data MDT is switched to the Default MDT to conserve bandwidth
In Multicast VPN （MVPN） implementations， which two of the following statements are regarding the DefaultMDT Group？（）
- A、It is used for PIM control traffic
- B、It is optionally configured for a high bandwidth multicast source to reduce multicast traffic replication to uninterested PE routers
- C、Within the VPF configuration in the PE router， multiple Default MDT groups are configured so each VPF can support multiple multicast sources
- D、There is a reduced multicast state in the MPLS core P routers
- E、When multicast traffic exceeds a certain configured threshold， traffic from the Data MDT is switched to the Default MDT to conserve bandwidth
相关考题：
Which two multicast protocol statements are true?() A. Sparse mode multicast uses a pull model to send multicast traffic to where it is requestedB. Dense mode multicast uses a push model to flood traffic throughout the network and then prunes the unwanted trafficC. Dense mode multicast requires explicit join messa ges from their membersD. Sparse mode uses reverse path forwarding (RPF) to prune off redundant flowsE. The primary use of sparse mode multicast is for test labs and router performance testing
Refer to the exhibit. All multilayer switches are running PIM dense mode. Recipient A and Recipient B are sending IGMPv2 joi n messages to their respective multilayer switches. Which statement is true?（）A. The Multicast Server is the root of the multicast tree. Switches 1, 3, 4, and 5 will participate in the multicast tree once pruning has taken place.B. The Multicast Serv er is the root of the multicast tree. Switches 4 and 5 will participate in the multicast tree once pruning has taken place.C. Switch 3 is the root of the multicast tree. Switches 3,4, and 5 will participate in the multicast tree once pruning has taken place.D. Switch 3 is the root of the multicast tree. Switches 1,3,4, and 5 will participate in the multicast tree once pruning has taken place.E. Switch 1 is the root of the multicast tree. Switches 1,4, and 5 will participate in the multicast tree once pruning has taken place.F. Switch 1 is the root of the multicast tree. Switches 1,3,4, and 5 will participate in the multicast tree once pruning has taken place.
Which three IP multicast address related statements are true?（）A、Multicast addresses 224.0.0.13 and 224.0.0.22 are reserved link - local addresses used by PIMv2 and IGMPv3B、Because they would map to overlapping IP multicast MAC addresses, multicast addresses 224.0.1.1 and 238.1.1.1 could not be used toget herC、Multicast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted with Time to Live (TTL) greater than 1D、Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routersE、The a dministratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in purpose to RFC 1918 private unicast addressesF、Multicast address 224.0.1.1 has been reserved for the Network Time Protocol (NTP) by the IANA
Which two statements are true about the rendezvous poin t (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 multicast 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 Multicast sparse - dense mode (PIM - SDM).F、To form the multicast distribution tree, the multicast sources register with and the receivers join the RP.
Apart from interdomain multicast routing， what else is MSDP used for？（）A、Source Specific Multicast and IGMPv2B、Announcing multicast sources to BGP speakersC、Anycast RPD、Intradomain multicast routing
What is the purpose of IGMP in a multicast implementation？（）A、 it is not used in multicastB、 it determines the virtual address group for a multicast destinationC、 it dynamically registers individual hosts in a multicast group on a specific LAND、 it is used on WAN connections to determine the maximum bandwidth of a connectionE、 it determines whether Bidirectional PIM or PIM sparse mode will be used for a multicast flow
In computer networking a multicast address is an identifier for a group of hosts that have joined amulticast group. Multicast addressing can be used in the Link Layer （OSI Layer 2）， such as Ethernet Multicast， as well as at the Internet Layer （OSI Layer 3） as IPv4 or IPv6 Multicast. Whichtwo descriptions are correct regarding multicast addressing？（）A、The first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast applicationB、The last 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast applicationC、To calculate the Layer 2 multicast address， the host maps the last 23 bits of the IP address intothe last 24 bits of the MAC address. The high-order bit is set to 0D、The first 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application
What is the purpose of the WLC Controller-Multicast-IGMP Timeout feature operating on v5.2?（）A、to determine if there are more clients that are using the multicast streamB、to limit the time that a client has to request an IGMP join to the controller multicast groupC、to determine if the multicast router is still alive and responding to multicast clientsD、to remove clients from the multicast group if the multicast traffic exceeds the allotted bandwidth allowed for multicast clients
Which three IP multicast address related statements are true？ （Choose three.） （） A、Multicast addresses 224.0.0.0 through 224.0.0.255 are always forwarded because they are transmitted with Time to Live （TTL） greater than 1.B、Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routers.C、Multicast addresses 224.0.0.13 and 224.0.0.22 are reserved link-local addresses used by PIMv2 and IGMPv3.D、Because they would map to overlapping IP multicast MAC addresses， multicast addresses 224.0.1.1 and 238.1.1.1 could not be used together.E、Multicast address 224.0.1.1 has been reserved for the Network Time Protocol （NTP） by the IANAF、The administratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in purpose to RFC 1918 private unicast addresses.
Which two statements are tru e about the rendezvous point (RP) in a multicast network?（）A、The multicast sources must register with the RP to form the multicast distribution treeB、An RP is required only in networks running Protocol Independent Multicast dense mode ( PIM DM)C、The multicast receivers must register with the RP to form the multicast distribution treeD、An RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM)E、An RP is required only in networks running Pro tocol Independent Multicast sparse - dense mode (PIM - SDM)F、To form the multicast distribution tree, the multicast sources register with and the receivers join the RP
In PIM-SM operations，to which device does the first router that connects with the multicast source sendthe register message？（）A、RPB、multicast sourceC、IGMP routerD、multicast receiverE、PIM designated router
Which three IP multicast group concepts are true?（）A、If a packet is sent to a multicast group address, the multicast frame contains the source multicast address.B、A router does not have to be a member of a multicast group to recei ve multicast data.C、A router must be a member of a multicast group to send to the group.D、A router does not have to be a member of a multicast group to send to the group.E、If a packet is sent to a multicast group address, all members of the multic ast group will receive it.F、A router must be a member of a multicast group to receive multicast data.
What is the purpose of a rendezvous point (RP)?（）A、acts as a meeting place for sources and receivers of multicast trafficB、used in PIM dense m ode to create a database of all multicast sourcesC、used in PIM dense and sparse mode to create a database of all multicast sourcesD、acts as the designated router for a broadcast segment when multicast routing is enabled
Which two of these are characteristics of multicast routing？ （）A、 multicast routing uses RPFB、 multicast routing is connectionless.C、 In multicast routing， the source of a packet is known.D、 When network topologies change， multicast distribution trees are not rebuilt， but use the originalpathE、 Multicast routing is much like unicast routing， with the only difference being that it has a a groupof receivers rather than just one destination
Which three IP multicast group concepts are true？ （Choose three.） （）A、 If a packet is sent to a multicast group address， all members of the multicast group will receive itB、 If a packet is sent to a multicast group address， the multicast frame contains the source multicast addressC、 A router does not have to be a member of a multicast group to receive multicast data.D、 A router does not have to be a member of a multicast group to send to the group.E、 A router must be a member of a multicast group to receive multicast data.F、 A router must be a member of a multicast group to send to the group.
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.
What is the encapsulation format of an MPLS Multicast VPN （MVPN） packer？（）A、IP unicast in IP unicastB、IP multicast in IP anycastC、IP anycast in IP anycastD、IP multicast in IP unicastE、IP multicast in IP multicastF、IP unicast in IP multicast
多选题Which two statements are true about the rendezvous poin t (RP) in a multicast network?（）AThe multicast sources must register with the RP to form the multicast distribution tree.BAn RP is required only in networks running Protocol Independent Multicast dense mode (PIM DM).CThe multicast receivers must register with the RP to form the multicast distribution tree.DAn RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM).EAn RP is required only in networks running Protocol Independent Multicast sparse - dense mode (PIM - SDM).FTo form the multicast distribution tree, the multicast sources register with and the receivers join the RP.
单选题When using Overlay Transport Virtualization （OTV）， how do L2 multicast frames traverse the overlay？（）A The L2 multicast frames are encapsulated in an OTV packet using the configured control-group multicast address for transportB The L2 multicast frames are dropped because multicast cannot be carried across the overlay C The L2 multicast frames are encapsulated in an OTV packet using the configured data-group multicast address for transportD The L2 multicast frames are forwarded natively across the overlay based on their multicast IDs
多选题Which three IP multicast group concepts are true？ （Choose three.） （）AIf a packet is sent to a multicast group address， all members of the multicast group will receive itBIf a packet is sent to a multicast group address， the multicast frame contains the source multicast addressCA router does not have to be a member of a multicast group to receive multicast data.DA router does not have to be a member of a multicast group to send to the group.EA router must be a member of a multicast group to receive multicast data.FA router must be a member of a multicast group to send to the group.
单选题What is the encapsulation format of an MPLS Multicast VPN （MVPN） packer？（）AIP unicast in IP unicastBIP multicast in IP anycastCIP anycast in IP anycastDIP multicast in IP unicastEIP multicast in IP multicastFIP unicast in IP multicast
多选题Which three IP multicast group concepts are true?（）AIf a packet is sent to a multicast group address, the multicast frame contains the source multicast address.BA router does not have to be a member of a multicast group to receive multicast data.CA router must be a member of a multicast group to send to the group.DA router does not have to be a member of a multicast group to send to the group.EIf a packet is sent to a multicast group address, all members of the multicast group will rece ive it.FA router must be a member of a multicast group to receive multicast data.
多选题Which two statements are true about the rendezvo us point (RP) in a multicast network?（）AThe multicast sources must register with the RP to form the multicast distribution tree.BAn RP is required only in networks running Protocol Independent Multicast dense mode (PIM DM).CThe mu lticast receivers must register with the RP to form the multicast distribution tree.DAn RP is required only in networks running Protocol Independent Multicast sparse mode (PIM SM).EAn RP is required only in networks running Protocol Independent Mu lticast sparse - dense mode (PIM - SDM).FTo form the multicast distribution tree, the multicast sources register with and the receivers join the RP.
多选题In computer networking a multicast address is an identifier for a group of hosts that have joined amulticast group. Multicast addressing can be used in the Link Layer （OSI Layer 2）， such as Ethernet Multicast， as well as at the Internet Layer （OSI Layer 3） as IPv4 or IPv6 Multicast. Whichtwo descriptions are correct regarding multicast addressing？（）AThe first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast applicationBThe last 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast applicationCTo calculate the Layer 2 multicast address， the host maps the last 23 bits of the IP address intothe last 24 bits of the MAC address. The high-order bit is set to 0DThe first 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application
多选题Which three IP multicast group concepts are true?（）AIf a packet is sent to a multicast group address, the multicast frame contains the source multicast address.BA router does not have to be a member of a multicast group to recei ve multicast data.CA router must be a member of a multicast group to send to the group.DA router does not have to be a member of a multicast group to send to the group.EIf a packet is sent to a multicast group address, all members of the multic ast group will receive it.FA router must be a member of a multicast group to receive multicast data.
单选题What is the purpose of the WLC Controller-Multicast-IGMP Timeout feature operating on v5.2?（）Ato determine if there are more clients that are using the multicast streamBto limit the time that a client has to request an IGMP join to the controller multicast groupCto determine if the multicast router is still alive and responding to multicast clientsDto remove clients from the multicast group if the multicast traffic exceeds the allotted bandwidth allowed for multicast clients
单选题Which statement correctly describes a wireless client Layer 2 roam from AP1 to AP2 while joined to a multicast stream using Cisco WLC running v5.2?（）AClient issues an IGMP join after association with AP2, allowing AP2 to request a multicast stream from Cisco WLC after AP1 issues an IGMP query.BClient issues an IGMP join after association with AP2, allowing AP2 to request a multicast stream from Cisco WLC independent of AP1 multicast member status.CClient resumes multicast after association with AP2, because multicast information is sent in mobility exchanges and AP2 is already a member of the multicast group, provided that another client has already joined that multicast.DClient resumes multicast after association with AP2, because multicast information is sent in mobility exchanges and AP2 is already a member of the multicast group, regardless if any other clients have already joined that multicast.
多选题Which two multicast protocol statements are true?（）ASparse mode multicast uses a pull model to send multicast traffic to where it is requestedBDense mode multicast uses a push model to flood traffic throughout the network and then prunes the unwanted trafficCDense mode multicast requires explicit join messa ges from their membersDSparse mode uses reverse path forwarding (RPF) to prune off redundant flowsEThe primary use of sparse mode multicast is for test labs and router performance testing