12. Refer to the exhibit.
[attach]***[/attach]
The access list has been configured on the S0/0 interface of router RTB in the outbound direction. Which two
packets, if routed to the interface, will be denied? (Choose two.)
access-list 101 deny tcp 192.168.15.32 0.0.0.15 any eq telnet
access-list 101 permit ip any any
A. source ip address: 192.168.15.5; destination port: 21
B. source ip address:, 192.168.15.37 destination port: 21
C. source ip address:, 192.168.15.41 destination port: 21
D. source ip address:, 192.168.15.36 destination port: 23
E. source ip address: 192.168.15.46; destination port: 23
F. source ip address:, 192.168.15.49 destination port: 23
Answer: DE
解释:这个访问控制列表是拒绝从192.168.15.32 0.0.0.15 到任何地方的telnet流量,telnet的端口号是23
那么只要答案中source地址在192.168.15.32 0.0.0.15 范围内,目的端口号是23的所有流量都会被deny.
所以答案是D E
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