单项选择题 X．25协议是哪两种设备进行交互的规程？（）

单项选择题 A host on the LAN is accessing an FTP server across the Internet. Which of the following addresses could appear as a source address for the packets forwarded by the router to the destination server（）。

单项选择题 Refer to the exhibit. What command sequence will enable PAT from the inside to outside network?（）