单项选择题
A. Deploy the service pack to a single department within the corporation.
B. Upgrade the system with requirements for that service pack.
C. Deploy the service pack to a non-critical application server.
D. Submit a change control for the service pack deployment.
单项选择题 Which of the following servers resolves computer names to IP addresses?（）
单项选择题 Which of the following BEST describes the function of a redundant power supply?（）
单项选择题 A group of users report that they can access local resources but cannot access the Internet. Which of the following should the administrator use to test connectivity?（）