单项选择题
A. Implement preventative measures.
B. Close the issue.
C. Document the outcome.
D. Question other users to make sure they are not having the same issue.
单项选择题 An environment has a DC server and an Exchange server. The administrator needs to install a patch and restart both servers while minimizing downtime. Which of the following is the BEST way to restart the servers?（）
单项选择题 An administrator receives a call from a user who is unable to receive email. After checking the workstation and email settings the administrator is still not able to determine the problem. Which of thefollowing is the NEXT step that the administrator should take？ （）
单项选择题 When disposing of computer equipment, which of the following can present an environmental hazard?（）