单选题Which statement about data center access layer design modes is correct？（）AThe access layer is the first oversubscription point in a data center design.BWhen using a Layer 2 loop-free design， VLANs are extended into the aggregation layer.CWhen using a L

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单选题

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

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

When using a Layer 2 loop-free design， VLANs are extended into the aggregation layer.

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

When using a Layer 3 design， stateful services requiring Layer 2 connectivity are provisionedfrom the aggregation layer.

The data center access layer provides the physical-level connections to the server resourcesand only operates at Layer 3.

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第1题：

Which two design recommendations are most appropriate when EIGRP is the data center core routing 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.

参考答案：A, E

第2题：

Which statement about the S-Series native FTP proxy is not true？（）

A、 both active and passive modes FTP are supported
B、 by default the FTP proxy uses port 8021
C、 access polices may apply to native FTP traffic
D、 data loss prevention policies may apply to native FTP traffic
E、 authentication is supported in transparent mode

正确答案:E

第3题：

Refer to the exhibit. Which two statements about the topologies shown are correct?()

A. Design 1 is a looped triangle design.

B. Design 2 is a looped triangle design.

C. Design 2 achieves quick convergence using RSTP.

D. Both designs supportstateful services at the aggregation layer.

E. Design 2 is the most widely deployed in enterprise data centers.

参考答案：A, D

第4题：

In the three-layer hierarchical network design model；what’s associated with the access layer？（）

A、optimized transport structure
B、high port density
C、boundary definition
D、data encryption
E、local VLANs
F、route summaries

正确答案:B,E

第5题：

Which unique characteristics of the Data Center Aggregation layer must be considered by an Enterprise Campus designer？（）

A、 Layer 3 routing between the Access and Aggregation layers facilities the ability to span VLANsacross multiple access switches， which is a requirement for many server virtualization andclustering technologies.
B、 “East-west” server-to-server traffic can travel between aggregation modules by way of the core，but backup and replication traffic typically remains within an aggregation module.
C、 Load balancing， firewall service， and other network service are commonly integrated by the useof service modules that are inserted in the aggregation switched.
D、 Virtualization tools allow a cost effective approach for redundancy in the network design byusing two or four VDCs from the same physical switch.

正确答案:D

第6题：

Which statement about access lists that are applied to an interface is true?()

A.you can apply multiple access lists with the same protocol or in different…

B.you can config one access list,per direction,per layer 3 protocol

C.you can placeasmanyaccess lists as you want on any interface

D.you can apply ony one access list on any interface

参考答案：D

第7题：

When you design QoS on CE for an MPLS Layer 2 VPN， which three things should be considered？（）

A、Layer 2 access link QoS design
B、enterprise-to-service-provider mapping models
C、Layer 3 link access QoS design
D、service provider service level agreements
E、Layer 2 link access load balancing

正确答案:A,B,D

第8题：

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.

参考答案：B, C

第9题：

Which statement about the Lightweight Access Point Protocol （LWAPP） is true？（）

A、 LWAPP encrypts control traffic between the AP and the controller.
B、 LWAPP encrypts user traffic with a x.509 certificate using AES-CCMP
C、 LWAPP encrypts both control traffic and user data.
D、 When set to Layer 3， LWAPP uses a proprietary protocol to communicate with the Cisco Aironet APs.

正确答案:A

第10题：

Which statement is true about the data traffic between the access point named TKAP1 and controller TKC1？（）

A、 The data traffic between the access point and controller is not encrypted.
B、 The data traffic is encapsulated with LWAPP.
C、 The data traffic is switched at the access point before being sent to the WLAN controller where VLAN tagging and QoS are applied.
D、 The data traffic is encrypted with AES.
E、 All of the above

正确答案:B

Which statement about data center access layer design modes

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