单项选择题
A. FTP traffic from 192.169.1.22 will be denied
B. No traffic, except for FTP traffic will be allowed to exit E0
C. FTP traffic from 192.169.1.9 to any host will be denied
D. All traffic exiting E0 will be denied
E. All FTP traffic to network 192.169.1.9/29 will be denied
单项选择题 As a network administrator, you have been instructed to prevent all traffic originating on the LAN from entering the R2 router. Which the following command would implement the access list on the interface of the R2 router?（）
单项选择题 A network administrator wants to add a line to an access list that will block only Telnet access by the hosts on subnet 192.168.1.128/28 to the server at 192.168.1.5. What command should be issued to accomplish this task?（）
单项选择题 Which protocol is an open standard protocol framework that is commonly used in VPNs,to provid secure end-to-end communication?（）