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 receive multicast data.C、A rou

题目

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 receive 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 multicast group will rece ive it.
  • F、A router must be a member of a multicast group to receive multicast data.
相似考题

1.● A multicast router may receive thousands of multicast （71） every day for different groups. If a router has no knowledge about the membership status of the （72） , it must broadcast all of these packets. This creates a lot of traffic and consumes （73）. A better solution is to keep a list of groups in the network for which there is at least one loyal member. （74） helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the （75） packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.（71）A. packetsB. errorsC. reportsD. alarms（72）A. routersB. networkC. packetsD. hosts（73）A. capabilityB. powerC. bandwidthD. address（74）A. ICMPB. IGMPC. OSPFD. RIP（75）A. anycastB. multicastC. unicastD. broadcast

2.Typically, an IP address refers to an individual host on a particular network. IP also accommodates addresses that refer to a group of hosts on one or more networks. Such addresses are referred to as multicast addresses, and the act of sending a packet from a source to the members of a （1）group is referred to as multicasting. Multicasting done （2）the scope of a single LAN segment is straightforward. IEEE 802 and other LAN protocols include provision for MAC-level multicast addresses. A packet with a multicast address is transmitted on a LAN Segment. Those stations that are members of the （3）multicast group recognize the multicast address and （4）the packet. In this case, only a single copy of the packet is ever transmitted. This technique works because of the （5）nature of a LAN: A transmission from any one station is received by all other station on the LAN.A.numerousB.onlyC.singleD.multicast@@@SXB@@@A.withinB.out ofC.beyondD.cover@@@SXB@@@A.differentB.uniqueC.specialD.corresponding@@@SXB@@@A.rejectB.acceptC.discardD.transmit@@@SXB@@@A.multicastB.unicastC.broadcastD.multiple unicast

3.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.

4.A multicast router may receive thousands of multicast(71)every day for different groups. If a router has no knowledge about the membership status of the(72), it must broadcast all of these packets. This creates a lot of traffic and consumes(73). A better solution is to keep a list of groups in the network for which there is at least one loyal member.(74)helps the multicast router create and update this list. For each group, there is one router that has the duty of distributing the(75)packets destined for that group. This means that if there are three multicast routers connected to a network, their lists of groupids are mutually exclusive. A host or multicast router can have membership in a group.A．packetsB．errorsC．reportsD．alarms

更多“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 receive multicast data.C、A rou”相关问题

  • 第1题：

    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 IGMPv3

    B.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 her

    C.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

    D.Multicast addresses 224.0.0.5 and 224.0.0.6 are source multicast addresses for OSPF routers

    E.The a dministratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in purpose to RFC 1918 private unicast addresses

    F.Multicast address 224.0.1.1 has been reserved for the Network Time Protocol (NTP) by the IANA


    参考答案：A, E, F

  • 第2题：

    Typically, an IP address refers to an individual host on a particular network. IP also accommodates addresses that refer to a group of hosts on one or more networks. Such addresses are referred to as multicast addresses, and the act of sending a packet from a source to the members of a （1）group is referred to as multicasting. Multicasting done （2）the scope of a single LAN segment is straightforward. IEEE 802 and other LAN protocols include provision for MAC-level multicast addresses. A packet with a multicast address is transmitted on a LAN Segment. Those stations that are members of the （3）multicast group recognize the multicast address and （4）the packet. In this case, only a single copy of the packet is ever transmitted. This technique works because of the （5）nature of a LAN: A transmission from any one station is received by all other station on the LAN.

    空白（5）应选（ ）。

    A. Multicast
    B. unicast
    C. broadcast
    D. multiple unicast

    答案：C
    解析：
    一般来说，一个IP地址对应网络上的一台主机。IP地址还能标识一组或多个网络上的主机组的地址，这种地址叫IP组播地址，把数据源发出的数据包传送给相应组播组成员的过程叫组播。组播在单一局域网段是直接传送的，使用IEEE802以及一些局域网协议如物理层协议。当包含一个组播地址的数据包在局域网段传输时，属于接收数据的组播组中的工作站能够识别这个地址并接收数据包。采用这种方式只需传送一份数据包副本，这是因为局域网是广播通信这个性质：即由一个工作站发出的数据可以被同一局域网内的所有工作站接收。

  • 第3题：

    Typically，an IP address refers to an individual host on a particular network. IP also accommodates addresses that refer to a group of hosts on one or more networks.Such addresses are referred to as multicast addresses，and the act of sending a packet from a source to the members of a （71）group is referred to as multicasting. Multicasting done （72） the scope of a single LAN segment is straight forward. IEEE 802 and other LAN protocols include provision for MAC-level multicast addresses. A packet with a multicast address is transmitted on a LAN segment.Those stations that are members of the （73）multicast group recognize the multicast address and （74）the packet.In this case,only a single copy of the packet is ever transmitted.This technique works because of the （本题）nature of a LAN:A transmission from any one station is received by all other stations on the LAN.


    A .multicast
    B. unicast
    C.broadcast
    D.multiple unicast

    答案：C
    解析：

  • 第4题：

    Which three statements are true about the Internet Group Management Protocol (IGMP)? （）

    • A、There are three IGMP modes: dense mode, sparse mode, and sparse - dense mode
    • B、IGMP is used to register individual hosts with a multicast group
    • C、IGMP version 3 enables a multicast receiving host to specify to the router which sources it should forward traffic from
    • D、IGMP messages a re IP datagrams with a protocol value of 2, destination address of 224.0.0.2, and a TTL value of 1
    • E、IGMP is a multicast routing protocol that makes packet - forwarding decisions independent of other routing protocols such as EIGRP
    • F、IGMP snooping ru ns on Layer 3 routers

    正确答案:B,C,D

  • 第5题：

    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

    正确答案:C

  • 第6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？（）

    • A、The first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast application
    • B、The last 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application
    • C、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 0
    • D、The first 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application

    正确答案:C,D

  • 第7题：

    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

    正确答案:A

  • 第8题：

    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 it
    • B、 If a packet is sent to a multicast group address， the multicast frame contains the source multicast  address
    • C、 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.

    正确答案:A,D,E

  • 第9题：

    Which three attributes are carried in a source active message?（）

    • A、NLRI information
    • B、IP address of originating RP
    • C、address of multicast source
    • D、all active RPs in the local domain
    • E、group address to which the source is sending

    正确答案:B,C,E

  • 第10题：

    单选题
    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


    正确答案： B
    解析： 暂无解析

  • 第11题：

    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？（）
    A

    The first 23 bits of the multicast MAC address are 0x01-00-5E. This is a reserved value thatindicates a multicast application

    B

    The last 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application

    C

    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 0

    D

    The first 3 bytes （24 bits） of the multicast MAC address are 0x01-00-5E. This is a reservedvalue that indicates a multicast application


    正确答案： C,B
    解析： 暂无解析

  • 第12题：

    多选题
    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 it

    B

    If a packet is sent to a multicast group address， the multicast frame contains the source multicast  address

    C

    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.


    正确答案： A,D,E
    解析： 暂无解析

  • 第13题：

    Refer to the exhibit. IP multicast for group address 224.1.1.1 has been enabled on all router s in the network. Hosts on Network A receive the multicast traffic. However, hosts on Network B do not. On the basis of outputs provided, what could be the cause of the problem? （）

    A. The route to 224.69.15.0/24 will be out Ethernet 0

    B. The reverse path forwarding (RPF) for the route 224.2.0.1 failed to find the interface on which the multicast packet was rece ived

    C. Multicast route to 224.69.15.0/24 was added to the mroute table and created by a source directly connected to the router

    D. Multicast route to 10.16.0.0/16 was added to the mroute table and created by a source directly connected to the router

    E. This router received an IGMP host report from a group member or a PIM join message


    参考答案：A

  • 第14题：

    Typically, an IP address refers to an individual host on a particular network. IP also accommodates addresses that refer to a group of hosts on one or more networks. Such addresses are referred to as multicast addresses, and the act of sending a packet from a source to the members of a （1）group is referred to as multicasting. Multicasting done （2）the scope of a single LAN segment is straightforward. IEEE 802 and other LAN protocols include provision for MAC-level multicast addresses. A packet with a multicast address is transmitted on a LAN Segment. Those stations that are members of the （3）multicast group recognize the multicast address and （4）the packet. In this case, only a single copy of the packet is ever transmitted. This technique works because of the （5）nature of a LAN: A transmission from any one station is received by all other station on the LAN.

    空白（3）应选（ ）。

    A. Different
    B. unique
    C. special
    D. corresponding

    答案：D
    解析：
    一般来说，一个IP地址对应网络上的一台主机。IP地址还能标识一组或多个网络上的主机组的地址，这种地址叫IP组播地址，把数据源发出的数据包传送给相应组播组成员的过程叫组播。组播在单一局域网段是直接传送的，使用IEEE802以及一些局域网协议如物理层协议。当包含一个组播地址的数据包在局域网段传输时，属于接收数据的组播组中的工作站能够识别这个地址并接收数据包。采用这种方式只需传送一份数据包副本，这是因为局域网是广播通信这个性质：即由一个工作站发出的数据可以被同一局域网内的所有工作站接收。

  • 第15题：

    Which statement is true of a source that wants to transmit multicast traffic to group 239.1.1.1？（）

    • A、Before sending traffic, it must first join  multicast group 239.1.1.1 by sending an IGMPv2 membership report to the default router on the local subnet.
    • B、It must send an IGMPv2 Request to Send  packet and then wait for an IGMPv2 Clear to Send packet from the IGMPv2 querier router on the local subnet
    • C、It may begin transmitting multicast traffic to the group only when there is no other host transmitting to the group on the local subnet.
    • D、It may transmit multicast traffic to the group at any time. 

    正确答案:D

  • 第16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 transport
    • B、 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 transport
    • D、 The L2 multicast frames are forwarded natively across the overlay based on their multicast IDs

    正确答案:C

  • 第17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?（）

    • A、Client issues an IGMP join after association with AP2, allowing AP2 to request a multicast stream from  Cisco WLC after AP1 issues an IGMP query.
    • B、Client issues an IGMP join after association with AP2, allowing AP2 to request a multicast stream from  Cisco WLC independent of AP1 multicast member status.
    • C、Client 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.
    • D、Client 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.

    正确答案:D

  • 第18题：

    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 IANA
    • F、The administratively scoped multicast addresses 239.0.0.0 through 239.255.255.255 are similar in  purpose to RFC 1918 private unicast addresses.

    正确答案:C,E,F

  • 第19题：

    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.

    正确答案:D,E,F

  • 第20题：

    Which three IP multicast related statements are true？ （Choose three.）  （）

    • A、 Multicast addresses 224.0.1.0 through 238.255.255.255 are called globally scoped addresses. They are used to multicast data between organizations and across the Internet
    • B、 The multicast address 224.0.0.1 is a globally scoped address that has been reserved for the Network  Time Protocol （NTP） by the IANA
    • C、 Multicast addresses 239.0.0.0 through 239.255.255.255 are called limited scope addresses. They are  constrained to a local group or organization
    • D、 Multicast addresses 224.0.0.5 and 224.0.0.6 are limited scoped addresses that have been reserved for  OSPF
    • E、 Multicast addresses 224.0.0.0 through 224.0.0.255 are used for network protocols on local LAN segments. Because they are always transmitted with a Time to Live （TTL） of 1， they are never forwarded  by a router

    正确答案:A,C,E

  • 第21题：

    单选题
    Which statement is true of a source that wants to transmit multicast traffic to group 239.1.1.1？（）
    A

    Before sending traffic, it must first join  multicast group 239.1.1.1 by sending an IGMPv2 membership report to the default router on the local subnet.

    B

    It must send an IGMPv2 Request to Send  packet and then wait for an IGMPv2 Clear to Send packet from the IGMPv2 querier router on the local subnet

    C

    It may begin transmitting multicast traffic to the group only when there is no other host transmitting to the group on the local subnet.

    D

    It may transmit multicast traffic to the group at any time. 


    正确答案： A
    解析： 暂无解析

  • 第22题：

    多选题
    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.


    正确答案： A,B
    解析： 暂无解析

  • 第23题：

    多选题
    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 receive 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 multicast group will rece ive it.

    F

    A router must be a member of a multicast group to receive multicast data.


    正确答案： F,B
    解析： 暂无解析

相关内容