单项选择题
A.During scheduled downtime
B.Once a year
C.As soon as the patches are finished installing
D.At the same time every day
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?（）
单项选择题 WhichofthefollowingportsMUSTbeopenonthefirewalltoallowremotedesktopconnectionand remoteassistancetrafficthrough？（）
单项选择题 A server was recently updated with the latest antivirus definitions. Immediately after the update， the server begins to report file not found errors for a mission critical application. Which of the following is the MOST likely reason for this？（）