单项选择题 An ISP has provided a DSL Internet connection with a static IP address. A technician is setting up a small office home office (SOHO) wireless router and needs to provide Internet access to five PCs on the network. Which of the following should be enabled?（）

单项选择题 Which of the following should a technician do FIRST in the BIOS to set up drive encryption?（）

单项选择题 A user calls about a problem with receiving email. After troubleshooting the user’s computer and finding nothing wrong, the technician contacts the email sender and finds out the user gave out their email address incorrectly. Which of the following is the BEST approach in explaining the issue to the user?（）