單項選擇題Which statement correctly describes a situation in which VRFs are used in the data center？（）

A. Partitioning of network resources is enabled.
B. VRFs cannot support path isolation from MAN/WAN designs.
C. VRFs cannot be used to map a virtualized data center to a MPLS implementation.
D. VRFs do not allow for the use of application services with multiple access topologies.
E. An access design using a VRF allows for an aggregation layer service module solution.


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1.多項選擇題Which two statements correctly describe a situation in which an Active/Standby Service Module design is being used？ （）

A. Troubleshooting is more complicated.
B. Service and switch modules are underutilized.
C. Layer 2 adjacency is required with the servers that use this design.
D. Layer 3 adjacency is required with the servers that use this design.
E. Load balancing will always occur across both access layer uplinks.

2.多項選擇題Which two design recommendations are most appropriate when EIGRP is the data center corerouting protocol？ （）

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.

3.多項選擇題Which two design recommendations are most appropriate when OSPF is the data center core routing protocol？ （）

A. Never use passive interfaces.
B. Use NSSA areas from the core down.
C. Use totally stub areas to stop type 3 LSAs.
D. Use the lowest Ethernet interface IP address as the router ID.
E. Tune OSPF timers to enable OSPF to achieve quicker convergence

4.單項選擇題Which of the following is a characteristic of a data center core？（）

A. Server-to-server traffic always remains in the core layer.
B. The recommended practice is for the core infrastructure to be in Layer 3.
C. The boundary between Layer 2 and Layer 3 should be implemented in the aggregation layer.
D. The Cisco Express Forwarding hashing algorithm is the default， based on the IP address andLayer 4 port.
E. Core layer should run BGP along with an IGP because iBGP has a lower administrativedistance than any IGP.

5.多項選擇題Which two of these multicast deployments are most susceptible to attacks from unknown sources？（）

A. ASM
B. BiDir PIM
C. PIM-SM RP
D. RP-Switchover
E. Source Specific Multicast

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