Download New Updated (Spring 2015) Cisco 642-874 Actual Tests 61-70

Ensurepass

 

QUESTION 61

Which of the following is a recommended practice of a data center core?

 

A.

Server-to-server traffic always remains in the core layer.

B.

The core infrastructure should be in Layer 3.

C.

Core layer should run BGP along with an IGP because iBGP has a lower administrative distance than any IGP.

D.

The Cisco Express Forwarding hashing algorithm is the default, based on the IP address and Layer 4 port.

 

Correct Answer: B

 

 

 

 

 

QUESTION 62

Which statement about data center access layer design modes is correct?

 

A.

The access layer is the first oversubscription point in a data center design.

B.

The data center access layer provides the physical-level connections to the server resources and only

operates at Layer 3.

C.

When using a Layer 2 looped design, VLANs are not extended into the aggregation layer.

D.

When using a Layer 3 design, stateful services requiring Layer 2 connectivity are provisioned from the

aggregation layer.

 

Correct Answer: A

 

 

QUESTION 63

Which two design recommendations are most appropriate when EIGRP is the data center core routing protocol? (Choose two.)

 

A.

Summarize data center subnets.

B.

Use passive interfaces to ensure appropriate adjacencies.

C.

Tune the EIGRP timers to enable EIGRP to achieve quicker convergence.

D.

Adjust the default bandwidth value to ensure proper bandwidth on all links.

E.

Advertise a default summary route into the data center core from the aggregation layer.

 

Correct Answer: AE

 

 

QUESTION 64

Which two practices will avoid Cisco Express Forwarding polarization?(Choose two.)

 

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A.

The core layer should use default Layer 3 hash information.

B.

The core layer should use default Layer 4 hash information.

C.

The distribution layer should use default Layer 3 hash information.

D.

The distribution layer should use default Layer 4 hash information.

E.

The core layer should use Layer 3 and Layer 4 information as input to the Cisco Expressing Forwarding

hashing algorithm.

F.

The distribution layer should use Layer 3 and Layer 4 information as input into the Cisco Expressing

Forwarding hashing algorithm.

 

Correct Answer: AF

 

 

QUESTION 65

Which two of these are recommended practices with trunks? (Choose two.)

 

A.

use ISL encapsulation

B.

use 802.1q encapsulation

C.

set ISL to desirable and auto with encapsulation negotiate to support ILS protocol negotiation

D.

use VTP server mode to support dynamic propagation of VLAN information across the network

E.

set DTP to desirable and desirable with encapsulation negotiate to support DTP protocol negotiation.

 

Correct Answer: BE

 

 

QUESTION 66

Which three options are benefits of using VRFs within an enterprise network? (Choose three.)

 

A.

simplifies configuration and troubleshooting

B.

enables partitioning of network resources

C.

enhances security between user groups

D.

provides additional redundancy at Layer 3

E.

allows for routing and forwarding separation

F.

improves routing protocol convergence

 

Correct Answer: BCE

 

 

QUESTION 67

Which option is a common cause of congestion found in a campus network?

 

A.

input serialization delay

B.

output serialization delay

C.

Rx-queue starvation

D.

Tx-queue starvation

 

Correct Answer: D

 

 

QUESTION 68

Which two protocols are used for high availability in enterprise networks? (Choose two.)

 

A.

BGP

B.

GLBP

C.

RSTP

D.

VRRP

E.

OSPF

 

Correct Answer: BD

 

 

QUESTION 69

Which three major points are important for network virtualization to separate logical networks on a shared physical infrastructure? (Choose three.)

 

A.

VLANs

B.

data plane

C.

control plane

D.

VPNs

E.

VSANs

F.

management plane

 

Correct Answer: BCF

 

 

QUESTION 70

Which VRF component ensures control plane separation between the different Layer 3 VPNs?

 

A.

FIB

B.

routing protocol instance

C.

RIB

D.

a subset of the router interfaces

 

Correct Answer: B

 

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