单项选择题 An administrator needs to update the anti-virus， security patches， BIOS， and the web server software on a production system.  Which of the following is the BEST method to accomplish this？（）

单项选择题 Asabestpractice，whenshouldtheserverberebootedtoapplytherebootrequiredpatches？（）

单项选择题 A data center has had a power outage. Which of the following should the administrator do FIRST once the power is restored?（）