（CCNA－思科网络安装和支持工程师）(Cisco Certified Network Associate)是整个Cisco认证体系中最初级的认证，同时它也是获得、CCDP认证和的必要条件（CCIP认证、CCIE认证不强制要求），而且许多Cisco专业认证（Cisco Qualified Specialist）也要求考生首先得CCNA认证。
的考试
考试编号：
考试时间：110分钟（英语国家为90分钟）
考题数目：44-55题
及格分数：825
考试题型：模拟题；实验题、拖拽题、选择题
通过CCNA认证的价值
网络系统工程师认证培训结束后，便于进入知名的外企担任系统工程师，CCNA认证当作求职背景，不但找工作的门槛降低了，工作机会也跟着增加，而且实质薪资方面也有较满意调整。同时，经过考试认证前的专业技能的培训，能更彻底了解了Cisco的技术新知，具备Cisco网络基础设备的使用与维护能力。
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1. Refer to the exhibit. What could be possible causes for the "Serial0/0 is down" interface status?
(Choose two.)
A. A Layer 1 problem exists.
B. The bandwidth is set too low.
C. A protocol mismatch exists.
D. An incorrect cable is being used.
E. There is an incorrect IP address on the Serial 0/0 interface.
Answer: AD
2. Before installing a new, upgraded version of the IOS, what should be checked on the router, and which
command should be used to gather this information? (Choose two.)
A. the amount of available ROM
B. the amount of available flash and RAM memory
C. the version of the bootstrap software present on the router
D. show version
E. show processes
F. show running-config
Answer: BD
3. Refer to the exhibit. After HostA pings HostB, which entry will be in the ARP cache of HostA to support
this transmission?
A.
B.
C.
D.
E.
F.
Answer: D
4. Refer to the exhibit. Which two statements are true about interVLAN routing in the topology that is
shown in the exhibit? (Choose two.)
A. Host E and host F use the same IP gateway address.
B. Router1 and Switch2 should be connected via a crossover cable.
C. Router1 will not play a role in communications between host A and host D.
D. The FastEthernet 0/0 interface on Router1 must be configured with subinterfaces.
E. Router1 needs more LAN interfaces to accommodate the VLANs that are shown in the exhibit.
F. The FastEthernet 0/0 interface on Router1 and Switch2 trunk ports must be configured using the same
encapsulation type.
Answer: DF
5. Refer to the exhibit. Which two statements are true about the loopback address that is configured on
RouterB? (Choose two.)
A. It ensures that data will be forwarded by RouterB.
B. It provides stability for the OSPF process on RouterB.
C. It specifies that the router ID for RouterB should be 10.0.0.1.
D. It decreases the metric for routes that are advertised from RouterB.
E. It indicates that RouterB should be elected the DR for the LAN.
Answer: BC
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