单项选择题
Which of the following ports is the default for HTTP?（）
A.21
B.25
C.80
D.110
点击查看答案
相关考题
-
单项选择题
Which of the following keys is pressed to enter the Windows boot options after POST?（）
A.F1
B.F8
C.F10
D.F12 -
单项选择题
A networking device that sends packets to all connections is a:（）
A. gateway.
B. hub.
C. switch.
D. router. -
单项选择题
A technician is servicing a customer’s color laser printer and notices excess toner in the printer.Which of the following tools would BEST assist the technician in removing the excess toner?（）
A. Damp towel
B. Compressed air
C. Alcohol wipe
D. Computer vacuum
