多项选择题
A.802.11g
B.USB
C.Ethernet
D.Bluetooth
E.Serial
单项选择题 Which of the following protocols would be used in order to log into a router to configure a VLAN?（）
单项选择题 When a user’s computer is first turned on, they see a lock symbol and a blinking cursor. Which of the following was configured in the BIOS to show this?（）
单项选择题 A technician needs to replace a computer’s hard drive. Which of the following should thetechnician do FIRST?（）