听力原文:W:I don't think you can build your model in less than a week,with your limited experiences. M:Catherine made hers in three days.Why can't I,say,build mine in five days or six days? Q:What does the man say about Catherine? (18)
【简答题】● 实现网络安全的主要措施是(48) ,L2TP 与PPTP 是的两种代表性协议,其区别之一是(49) . (48) A. 对发送的全部内容加密 B. 对发送的载荷部分加密 C. 使用专用的加密算法加密 D. 使用专用的通信线路传送 (49) A. L2TP 只适于IP 网,传输PPP 帧;PPTP既适于IP 网,也适于非IP 网,传输以太帧 B. L2TP 只适于 IP 网,传输以太...