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Which three statements best describe multicast operation on 

题目
多选题
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.

参考答案和解析
正确答案： C,A
解析： 暂无解析
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Which three statements correctly describe the Cisco Validated Designs program? ()(Choose three.)

A. includes three design levels

B. incorporates products and technologies into enterprise, service provider, and commercial systems

C. extends the value of designs through a sustained development plan

D. does not factor customer input design process

E. facilitates faster and more reliable customer deployments

F. incorporates a narrow range of technologies and products


参考答案：B, C, E

第2题：

Which two of these statements best describe the benefits of WPAv2？ （Choose two.）（）

  • A、 SSID broadcast prevention
  • B、 man-in-the-middle attack protection
  • C、 cost reduction through software upgrades in all existing hardware
  • D、 dynamic key generation
  • E、 RF jamming prevention

正确答案:B,D

第3题：

Which three statements describe the User Datagram Protocol (UDP)?()

A.UDP provides delivery notification and error checking mechanisms.

B.UDP is faster than the Transmission Control Protocol (TCP).

C.UDP application examples include DNS and VoIP.

D.UDP is an application layer protocol.

E.UDP uses a best effort delivery approach.


参考答案：B, C, E

第4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5题：

Which of these is the best way to convince a prospect of the benefits of the S-Series？（） 

  • A、 show them independent tests and reviews
  • B、 describe the theory of operation and system internals
  • C、 give a Microsoft PowerPoint presentation
  • D、 give a demonstration that could lead to an evaluation

正确答案:D

第6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


参考答案：B, C, D

第7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

正确答案:A,E,F

第8题：

An ATM PVC is configured as atm pvc 1 0 101 aal5snap 256 128 100 .Which three statements describe the traffic management characteristics of this interface?()

A.A

B.B

C.C

D.D

E.E


参考答案：B, D, E

第9题：

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.

正确答案:A,C,D

第10题：

Which three statements describe the User Datagram Protocol (UDP)?（）

  • A、UDP provides delivery notification and error checking mechanisms.
  • B、UDP is faster than the Transmission Control Protocol (TCP).
  • C、UDP application examples include DNS and VoIP.
  • D、UDP is an application layer protocol.
  • E、UDP uses a best effort delivery approach.

正确答案:B,C,E

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