单选题Multicast is being deployed in the network， and only ip pim sparse-dense mode has been configured on allinterfaces in the network to support a new video streaming application. No other multicast configuration wasapplied anywhere in the network. Since e

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单选题

Multicast is being deployed in the network， and only ip pim sparse-dense mode has been configured on allinterfaces in the network to support a new video streaming application. No other multicast configuration wasapplied anywhere in the network. Since enabling multicast， the network monitoring tools show periodic spikes in link utilization throughout the network， even in areas where the video application is not being used.What could be a possible cause？（）

PIM sparse mode is being used.

PIM dense mode is being used.

The BGP multicast address family has not been configured.

IGMP version 3 is being used.

IP PIM neighbor filters have not been applied.

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第1题：

When building an IP multicast domain using PIM which mode assumes that other routers do not want to forward multicast packets for the group?()

A. PIM - DM

B. PIM - SM

C. PIM - RP

D. CGMP

E. IGMP snooping

参考答案：B

第2题：

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.

正确答案:D,F

第3题：

Refer to the network of Layer 3 switches in the exhibit. The RPI Multi cast Server only multicasts to hosts connected to multilayer switches 5 and 6. The CMU Multicast Server multicasts to hosts on multilayer switches 1 - 6. Given the number of configuration steps involved, what is the most efficient way to configure the net work while meeting the requirements for multicast data flow? （）

A. Configure each switch with PIM sparse mode and a separate instance of PIM dense mode.Specify switch 1 as the root for the RPI Multicast Server. Specify switch 2 as the root for the CMU Multicast Server.

B. Configure each switch with PIM sparse mode and a separate instance of PIM dense mode. Leave each multicast server as the root of its own multicast tree.

C. Configure each switch with PIM sparse - dense mode. Configure switch 3 as a ren dezvous point for the RPI multicast stream.

D. Configure each switch with PIM sparse mode and a separate instance of PIM dense mode.Allow the switches to elect their own root for each multicast tree.

E. Configure each switch with PIM sparse mode.

F. Configure each switch with PIM dense mode.

参考答案：C

第4题：

Which three statements are true about IP multicast configuration?（）

A、PIM sparse - dense mode and PIM dense mode require an RP on the network.
B、PIM sparse mode and PIM dense mode require an RP on the network.
C、PIM sparse mode interfaces are always added to the multicast routing table in a router.
D、PIM sparse mode and PIM sparse - dense mode require an RP on the network.
E、PIM dense mode interfaces are always added to the multicast routing table in a router.
F、PIM sparse - dense mode acts as PIM dense mode if an RP is not known.

正确答案:D,E,F

第5题：

What is the default behaviour of PIM-SSM If there are multiple equal-cost paths to the multicast source？（）

A、It will send the join only to the neighbor with the highest IP address.
B、It will send the join only to the neighbor with the lowest IP address.
C、It will send the join in a round-robin fashion across all neighbors.
D、It will send the join to all neighbors.

正确答案:A

第6题：

Choose two commands that are required to enable multicast on a router， when it is known that thereceivers use a specific functionality of IGMPv3.（）

A、ip pim rp-address
B、ip pim ssm
C、ip pim sparse-mode
D、ip pim passive

正确答案:B,C

第7题：

Which command can be used to check the assignment of RPs to multicast groups？（）

A、show ip pim rendez-vous
B、show ip rpf rp mapping
C、show ip pim rp mapping
D、show ip pim rp info
E、show ip pim

正确答案:C

第8题：

When IP multicast is enabled via PIM, which mode uses the flood and prune metho d? Select the best response.()

A. PIM sparse - dense

B. Bidir - PIM

C. PIM - RP

D. PIM - DM

E. PIM - SM

参考答案：D

第9题：

When building an IP multicast domain using PIM which mode assumes that other routers do not want to forward multicast packets for the group?（）

A、PIM - DM
B、PIM - SM
C、PIM - RP
D、CGMP
E、IGMP snooping

正确答案:B

第10题：

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 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 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

正确答案:D,F

Multicast is being deployed in the network， and only ip pim

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