CCIE DC题库 - 考试题库

【单选题】

[1/146]How are IP multicast IGMP entries synchronized between vPC peers？（）

A.

IGMP is not synchronized between vPC peers

B.

Cisco Fabric Service carries IGMP entries across the vPC peer link

C.

IP ARP synchronization under the vPC domain configuration also synchronizes IGMP

D.

IGMP is flooded to the L2 domain， and there is no need to synchronize it between vPC peer

参考答案：

B

参考解析：

无

【单选题】

[2/146]Where are SAN Port Channel is created in UCS Manager？（）

A.

Under the Admin tab on the FI

B.

Under the Server tab in the service profile

C.

Under the SAN tab on each VSAN

D.

Under the Admin tab on the chassis

E.

Under the SAN tab on the Fabric Interconnect

参考答案：

E

参考解析：

无

【单选题】

[3/146]In a Cisco Unified Computing System， What is the "designated receiver" port in end-host mode used fo...

A.

Sending all broadcasts

B.

Receiving all traffic from upstream switches

C.

Receiving broadcast traffic

D.

Negotiating spanning tree with upstream switches

E.

Learning MAC addresses from upstream switche

参考答案：

C

参考解析：

无

【单选题】

[4/146]Why is a Cisco UCS B250 server unable to support 16-GB DIMMs？（）

A.

Dual-rank DIMMs are not supported.

B.

16-GB DIMMs are too slow.

C.

The largest DIMM an Intel 55xx or 56xx CPU can address is 32 GB

D.

The memory bus would be too long.

E.

The blade would run too hot.

参考答案：

C

参考解析：

无

【多选题】

[5/146]Which statements are true regarding the Cisco UCS fabric failover feature？（）

A.

FabricSync is used to synchronize MAC addresses to an adjacent fabric interconnect after a server interface failover.

B.

Gratuitous ARPs are sent on fabric interconnect uplinks after a server interface failover.

C.

Fabric failover can be used on vNICs and vHBAs.

D.

Fabric failover is configured as part of the service profile.

E.

Fabric interconnects in end-host mode use fabric failover instead of spanning tree to provide redundancy on uplink ports.

参考答案：

A B D

参考解析：

无

【单选题】

[6/146]What is the benefit of using Anycast RP via RFC 4610 for IP multicast RP re...

A.

Improves convergence of the multicast network due to enhanced RPF checks

B.

Simplifies the number of control plane protocols over other RP redundancy methods

C.

Eliminates the use of Protocol Independent Multicast （PIM） in the topology

D.

Increases the administrative distances in Multicast Source Discovery Protocol （MSDP） configuratio

参考答案：

B

参考解析：

无

【多选题】

[7/146]A Cisco UCS fabric interconnect in end-host mode learns MAC addresses on which port types？（）

A.

Uplink Ethernet ports or border ports

B.

Appliance ports

C.

Server ports

D.

Fabric ports

E.

Backplane ports

F.

vEth interfaces

G.

A Fabric Interconnect doesn’t learn MAC addresses in End Host mode. Pinning is used instead.

参考答案：

B C E F

参考解析：

无

【多选题】

[8/146]Overlay Transport Virtualization （OTV） overlay interface is a logical multiaccess and multicast- cap...

A.

When an OTV edge device receives a Layer 2 frame destined for a remote data center site， the frame is logically forwarded to the overlay interface.

B.

The OTV edge device performs the dynamic OTV encapsulation on the Layer 2 packet and sends it to the join interface toward the routed domain.

C.

When the OTV edge device receives a Layer 2 frame destined for a remote data center site， the frame is logically forwarded to the join interface.

D.

The OTV edge device performs the dynamic OTV encapsulation on the Layer 2 packet and sends it to the overlay interface toward the routed domain.

参考答案：

A B

参考解析：

无

【单选题】

[9/146]What would be the cause for the following fault in UCS Manager？（） "ether VIF x / xxx down， reason： ...

A.

The associated VLANs of a vNIC are not found on an uplink.

B.

Overlapping VLAN IDs exist on upstream disjoint networks.

C.

The vNIC was not configured for fabric failover.

D.

The vNIC is pinned to the wrong fabric.

E.

Overlapping VSAN IDs exist on upstream SAN switches.

F.

The vHBA was not configured for failover.

参考答案：

A

参考解析：

无

【单选题】

[10/146]What is the use of ERSPAN on N1kv？（）

A.

Send monitored traffic to a VLAN

B.

Send monitored traffic to a remote VEM over L2

C.

Receive monitored traffic on a vEthernet interface

D.

Send monitored traffic to an IP destinatio

参考答案：

D

参考解析：

无