思科知识的学习在一定基础上还是有些难度，为了帮助考生们复习好《思科认证：CCNA认证学科》，我们考吧网整理了思科认证模拟试题，本次汇编的模拟试题希望对你的考试有所帮助，预祝你考试顺利。

1. Which cable diagram displays the end to end pinout for a crossover cable used with Cisco devices? (3)

1) Cable A

2) Cable B

3) Cable C

4) Cable D

2. A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?

1) 172.16.0.0

2) 172.16.192.0

3) 172.16.192.128

4) 172.16.192.160

5) 172.16.192.168

6) 172.16.192.176

3. How is a MAC address represented? (4)

1) four groups of eight binary digits separated by a decimal point

2) four Base10 digits separated by a decimal point

3) six hexadecimal digits

4) twelve hexadecimal digits

5) twenty-four Base10 digits

4. Which of the following statements are correct about CSMA/CD? (Choose three.) (1，3，6)

1) It is a media access method used in LANs.

2) It is a media access method used in FDDI WANs.

3) When a device needs to transmit, it checks to see if the media is available.

4) A device sends data without checking media availability because all devices have equal access.

5) Multiple devices can successfully transmit simultaneously.

6) Only one device can successfully transmit at a time.

5. Which of the following increases the potential for a collision to occur? (4)

1) the use of an active hub instead of an intelligent hub

2) the use of an intelligent hub instead of an active hub

3) a reduction in the number of devices attached to the hub

4) an increase in the number of devices attached to the hub

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