1. 以下那一条语句是标准ACL？
A. access-list 2500 deny tcp any host 192.168.1.1 eq 22
B. access-list 50 deny 192.168.1.1 0.0.0.255
C. access-list 110 deny ip any any
D. access-list 101 deny tcp any host 192.168.1.1

2. 在路由器上进行ACL故障排查的时候，什么命令能用来确定ACL是否影响了哪些接口？
A. list ip interface
B. show ip access-list
C. show ip interface
D. show access-list

3. 以下什么命令能加密所有明文口令？
A. Router(config)#service password-encryption
B. Router#service password-encryption
C. Router(config)#password-encryption
D. Router#password-encryption

4. 以下哪一条aaa统计命令能用来记录用户在路由器上的终端会话的起始和终结的时间？
A. aaa accounting exec start-stop tacacs+
B. aaa accounting connection start-stop tacacs+
C. aaa accounting network start-stop tacacs+
D. aaa accounting system start-stop tacacs+

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