单项选择题 Which of the following command line tools can be used to display the default gateway, IP address,and DNS servers currently being used by a host?（）

单项选择题 Bob, a support technician, is trying to locate a particular registry key using REGEDIT.EXE, on aWindows 2000 PC. Which of the following is the BEST method of doing this?（）

单项选择题 A user reports that every time they start up their computer it stops with a bluescreen error. Whichof the following methods will give an alternate method of trying to start up a Windows computer?（）