642-874 Braindumps

Cisco

642-874

Question: 1

Refer to the exhibit.

Which recommended practice is applicable? 

A. If no core layer is deployed, the design will be easier to scale.

B. A dedicated campus core layer should be deployed for connecting three or more buildings.

C. If no core layer is deployed, the distribution switches should not be fully meshed.

D. A dedicated campus core layer is not needed for connecting fewer than five buildings. 

Answer: B

Question: 2

When a router has to make a rate transition from LAN to WAN, what type of congestion needs should be considered in the network design? 

A. RX-queue deferred

B. TX-queue deferred

C. RX-queue saturation

D. TX-queue saturation

E. RX-queue starvation

F. TX-queue starvation 

Answer: F

Question: 3

To which switch or switches should you provide redundant links in order to achieve high availability with reliable fast convergence in the enterprise campus? 

A. to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 2 link

B. to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 3 link

C. to two core switches from redundant distribution switches connected with a Layer 2 link

D. to two core switches from redundant distribution switches connected with a Layer 3 link

E. to two core switches running Cisco NSF and SSO from two redundant distribution switches running Cisco NSF and SSO 

Answer: D

Question: 4

Which of these statements is correct regarding Stateful Switchover and Cisco Nonstop Forwarding? 

A. Utilizing Cisco NSF in Layer 2 environments can reduce outages to one to three seconds.

B. Utilizing SSO in Layer 3 environments can reduce outages to one to three seconds.

C. Distribution switches are single points of failure causing outages for the end devices.

D. Utilizing Cisco NSF and SSO in a Layer 2 environment can reduce outages to less than one second.

E. NSF and SSO with redundant supervisors have the most impact on outages at the access layer. 

Answer: E

Question: 5

When is a first-hop redundancy protocol needed in the distribution layer? 

A. when the design implements Layer 2 between the access and distribution blocks

B. when multiple vendor devices need to be supported

C. when preempt tuning of the default gateway is needed

D. when a robust method of backing up the default gateway is needed

E. when the design implements Layer 2 between the access switch and the distribution blocks 

Answer: A

Question: 6

Which of these is a recommended practice with trunks? 

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 

Answer: B

Question: 7

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. 

Answer: B

Question: 8

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. 

Answer: A

Question: 9

Which of these Layer 2 access designs does not support VLAN extensions? 

A. FlexLinks

B. loop-free U

C. looped square

D. looped triangle

E. loop-free inverted U 

Answer: B

Question: 10

Which statement about Fibre Channel communications is correct? 

A. N_Port to N_Port connections use logical node connection points.

B. Flow control is only provided by QoS.

C. It must be implemented in an arbitrated loop.

D. Communication methods are similar to those of an Ethernet bus. 

Answer: A