Which of the following wireless technologies is primarily setup for video/audio and the frequency is 5 GHz?（）

单项选择题A user cannot undock a laptop from the docking station. Which of the following is the MOST likely cause?（）

A. The laptop is not turned off
B. The power cable is not unplugged
C. The lock button is set to lock
D. The ACPI settings are configured improperly

单项选择题A user is printing pictures to the color laser printer and the bottom half of the picture is faded. The printer is displaying no errors. Which of the following is the MOST likely resolution to the problem?（）

A. Replace the printer ribbon.
B. Replace the pickup assembly.
C. Replace the fuser.
D. Replace the print head.

单项选择题A user reports that the laser printer is constantly jamming on humid days. Which of the following is the MOST likely resolution to the problem?（）

A. Replace the paper with thinner paper.
B. Replace the toner cartridges.
C. Replace the fuser.
D. Replace the print heads.

单项选择题When setting up a new small office home office (SOHO) wireless network, which of the following is MOST likely to be the default wireless channel?（）

A.2
B.5
C.6
D.9

单项选择题A user would like to ensure that only their family and their laptops can access a newly installed wireless router. Which of the following BEST accomplishes this?（）

A. MAC filtering
B. Disable DHCP
C. Static IP addresses
D. Port forwarding