思科认证的学习在一定程度上难度较大，更多的是在于练习和阅读。为了帮助广大考生系统全面的复习好《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. Assuming the ACL in the graphic is correctly applied to an interface, what effect will this ACL have on network traffic? (3)

1) Host 192.168.15.4 will be denied ftp access to any destination, but will be permitted all other access.

2) All ftp traffic to host 192.168.15.4 will be denied.

3) All traffic from that interface will be denied.

4) No traffic will be denied because a "permit" statement does not exist in this ACL.

2. Which statement is true regarding the TCP protocol? (2)

1) Flow control at the transport layer is provided by adding a sequence number to each segment.

2) A sliding window allows for communicating devices to negotiate the amount of unacknowledged data that can be sent.

3) A window size of 1 would require a receiving device to send ACK 1 after the Segment 1 has been received.

4) TCP is used by sending hosts to segment large data files prior to transmission while IP is used by receiving host to reassemble the smaller segments.

3. Select the statements that describe ACL processing of packets. (Choose three.) (1、2、5)

1) An implicit deny any rejects any packet that does not match any ACL statement.

2) A packet can either be rejected or forwarded as directed by the statement that is matched.

3) A packet that has been denied by one statement can be permitted by a subsequent statement.

4) A packet that does not match the conditions of any ACL statements will be forwarded by default.

5) Each statement is checked only until a match is detected or until the end of the ACL statement list.

6) Each packet is compared to the conditions of every statement in the ACL before a forwarding decision is made.

4. Assuming the ACL in the graphic is correctly applied to an interface, what effect will the ACL have on network traffic? (3)

1) All traffic to network 172.16.0.0 will be denied.

2) All TCP traffic will be permitted to and from network 172.16.0.0.

3) All telnet traffic from the 172.16.0.0 network to any destination will be denied.

4) All port 23 traffic to the 172.16.0.0 network will be denied.

5) All traffic from the 172.16.0.0 network will be denied to any other network.

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思科认证：CCNA认证考前精选模拟试题汇总三

思科认证：CCNA认证考前精选模拟试题汇总四