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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.
参考答案
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 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.” 相关考题
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● 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
考题
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
考题
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.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
考题
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.
考题
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 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
考题
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 0B. The reverse path forwarding (RPF) for the route 224.2.0.1 failed to find the interface on which the multicast packet was rece ivedC. Multicast route to 224.69.15.0/24 was added to the mroute table and created by a source directly connected to the routerD. Multicast route to 10.16.0.0/16 was added to the mroute table and created by a source directly connected to the routerE. This router received an IGMP host report from a group member or a PIM join message
考题
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
考题
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
考题
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
考题
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 subnetC、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.
考题
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 modeB、IGMP is used to register individual hosts with a multicast groupC、IGMP version 3 enables a multicast receiving host to specify to the router which sources it should forward traffic fromD、IGMP messages a re IP datagrams with a protocol value of 2, destination address of 224.0.0.2, and a TTL value of 1E、IGMP is a multicast routing protocol that makes packet - forwarding decisions independent of other routing protocols such as EIGRPF、IGMP snooping ru ns on Layer 3 routers
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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
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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
考题
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.
考题
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 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
考题
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 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.
考题
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
考题
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.
考题
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 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.
考题
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 InternetB、 The multicast address 224.0.0.1 is a globally scoped address that has been reserved for the Network Time Protocol （NTP） by the IANAC、 Multicast addresses 239.0.0.0 through 239.255.255.255 are called limited scope addresses. They are constrained to a local group or organizationD、 Multicast addresses 224.0.0.5 and 224.0.0.6 are limited scoped addresses that have been reserved for OSPFE、 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
考题
Which three attributes are carried in a source active message?（）A、NLRI informationB、IP address of originating RPC、address of multicast sourceD、all active RPs in the local domainE、group address to which the source is sending
考题
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 subnetC
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.
考题
单选题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
考题
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.
考题
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？（）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
考题
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.
考题
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.
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