单选题Cisco Express Forwarding (CEF) is mainly used to increase packet switching speed, reducing the overhead and delays introduced by other routing techniques, increasing overall performance.Which of the following concerning CEF is recommended by Cisco?（）A

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单选题

Cisco Express Forwarding (CEF) is mainly used to increase packet switching speed, reducing the overhead and delays introduced by other routing techniques, increasing overall performance.Which of the following concerning CEF is recommended by Cisco?（）

Use default Layer 4 hash in core.

Use default Layer 3 hash in distribution.

Use default Layer 4 hash in distribution.

Use default Layer 3 hash in core and Layer 3 + Layer 4 hash in distribution layer.

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第1题：

Which three options are prerequisites to configuring Cisco AutoOoS？（）

A、Cisco Express Forwarding （CEF） must be globally enabled.
B、Prior to the enabling of the Cisco AutoOoS feature， the bandwidth command must be applied on all interfaces or subinterfaces.
C、After the enabling of the Cisco AutoOoS feature， the bandwidth command must be applied on all interfaces or subinterfaces .
D、OoS policies must be enabled on all interfaces that will participate in the AutoOoS configuration.
E、An IP address must be configured on all low-bandwidth interfaces （768 kb/s or lower） that will participate in the AutoOoS configuration
F、An IP address must be configured on all interfaces that will participate in the AutoOoS configuration

正确答案:A,B,E

第2题：

The Cisco AutoQoS feature is being used throughout the Company VOIP network. Which three statements about this feature are true？（）

A、The "mls qos" global configuration command must be entered before configuring AutoQoS.
B、CEF must be enabled.
C、The "no auto qos voip" command is used to disable Cisco AutoQos and revoke all configurations generated by Cisco AutoQos.
D、CDP must be enabled.
E、SNMP must be enabled.

正确答案:B,C,D

第3题：

Refer to the exhibit. You want to minimize the downtime that results from supervisor engine switchovers on Cisco 6500 Series Switches and Cisco 7600 Series Routers. To achieve this, you are considering deploying a Cisco Nonstop Forwarding with Stateful Switchover solution using OSPF.In the exhibit you can see the output of the show ip ospf neighbor detail command.Which trait of systems using Cisco Nonstop Forwarding with Stateful Switchover and OSPF is shown in the exhibit output and will impact your plan?（）

A. Stateful Switchover for Cisco Nonstop Forwarding only works with BGP.

B. Stateful Switchover for Cisco Nonstop Forwarding must be configured on all adjacent routers.

C. Cisco Nonstop Forwarding with Stateful Switchover helper mode is not supported on the adjacent router.

D. Cisco Nonstop Forwarding with Stateful Switchover helper mode for OSPF has been promiscuousstandardized and is supported on the adjacent router.

参考答案：D

第4题：

Where are CTI route points added or configured for Cisco Unified Contact Center Express? （）

A、Cisco Unified CallManager Device Configuration
B、Cisco Unified Contact Center Express Directory Management
C、Cisco Supervisor Desktop
D、Cisco CRS Administration, JTAPI Trigger Creation
E、Cisco Unified Contact Center Express Media Subsystem

正确答案:D

第5题：

What is a requirement to enable Cisco IOS IPS with 5.x signature？（）

A、disable Zone-Based Firewall as the two features are not compatible
B、disable Cisco Express Forwarding as the two features are not compatible
C、generate a certificate and export on Cisco.com to receive a signature update
D、import the public RSA key from the Cisco IPS team that allows the router to verify that a signatureupdate （which was signed by this key） comes from Cisco

正确答案:D

第6题：

Which two statements are true about Unicast Reverse Path Forwarding Loose Mode？（）

A、It is used in multihome network scenarios.
B、It can be used with BGP to mitigate DoS and DDoS.
C、It does not need to have CEF enabled.
D、It is enabled via the interface level command ip verify unicast reverse-path.
E、It cannot be used with "classification" access lists.

正确答案:A,B

第7题：

Cisco Express Forwarding has been enabled on router TK1. With CEF， prefixes that require exception processing can be cached with one of which four special adjacencies？（）

A、Kick
B、Drop
C、Forward
D、Null
E、Discard
F、Glean
G、Express

正确答案:B,D,E,F

第8题：

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

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.

参考答案：A, F

第9题：

Which one of the following potential issues is eliminated by using split horizon？（）

A、Joined horizons
B、Packet forwarding loops
C、cisco Express Forwarding load-balancing inconsistency
D、Asymmetric routing throughout the network

正确答案:B

第10题：

Cisco IOS is the software used on the vast majority of Cisco Systems routers and current Cisco network switches. As a network administrator, you are required to configure MPLS on Cisco IOS. In such a situation, which three of the following steps are necessary to take?（）

A、Start LDP.
B、Enable CEF switching.
C、Configure conditional label advertising.
D、Enable label switching on frame mode interfaces.
E、disable IP TTL propagation
F、configure conditional label advertising

正确答案:A,B,D

Cisco Express Forwarding (CEF) is mainly used to increase pa

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