单项选择题 A network technician is troubleshooting a network issue that has just been reported. Which of thefollowing troubleshooting steps should the technician take FIRST to help resolve this issue?（）

多项选择题 PPTP is a combination of which of the following protocols? (Select TWO).（）

单项选择题 A new segment needs to be added to a network to provide access for 64 servers. Which of thefollowing subnets will provide the needed access and still conserve IP addresses?（）