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Q81. CoS is applied for Layer 2 markings in an Ethernet environment. Which protocol must be configured on the Layer 2 switch port for CoS to work? 

A. MPLS 

B. IEEE 802.1W 

C. IEEE 802.1Q 

D. IEEE 802.1S 

Answer: C 


Q82. Port security supports which type of port? 

A. SPAN destination port 

B. EtherChannel port-channel port 

C. nonnegotiating trunk port 

D. DTP-enabled trunk port 

Answer: C 


Q83. Which algorithm does IS-IS use to determine the shortest path through a network? 

A. Bellman-Ford routing algorithm 

B. Johnson's.algorithm 

C. Dijkstra's algorithm 

D. Floyd-Warshall algorithm 

Answer: C 


Q84. Which QoS architecture provides scalability of implementation? 

A. IntServ 

B. DiffServ 

C. LLQ 

D. RSVP 

Answer: B 


Q85. The requirement for high availability within the Data Center network may cause the designer to consider which one of the following solutions? 

A. Construct a hierarchical network design using EtherChannel between a server and two VDCs from the same physical switch 

B. Utilize Cisco NSF with SSO to provide intrachassis SSO at Layers 2 to 4 

C. Define the Data Center as an OSPF NSSA area, advertising a default route into the DC and summarizing the routes out of the NSSA to the Campus Core 

D. Implement network services for the Data Center as a separate services layer using an active/active model that is more predictable in failure conditions 

Answer: B 


Q86. Which two design recommendations are most appropriate when EIGRP is the data center core routing protocol? (Choose two.) 

A. Summarize data center subnets. 

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

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. 

Answer: A,B 


Q87. A campus network in a switch block design requires redundant distribution switches, load sharing across uplinks, a loop-free topology, and only one gateway IP address per VLAN. Which switching technology meets all of the requirements? 

A. HSRP 

B. VSS 

C. Spanning Tree Protocol 

D. EtherChannel 

Answer: B 


Q88. Which Nexus feature enables you to support server connectivity with one topology and address requirement for both high availability and high bandwidth? 

A. vPC 

B. vPC+ 

C. Stackwise 

D. EvPC 

Answer: D