单项选择题 When adding another server to an existing rack mount system, which of the following should the administrator consider FIRST?（）

单项选择题 WhichofthefollowingwouldallowanadministratortoincorporateanewWindowsservicepackinto aninstallationwhenthemediadoesnotincludetheservicepack？（）

单项选择题 An administrator receives a call from a user who is unable to receive email. After troubleshooting the administrator is able to resolve the issue and verify that user is able to access email again. Which of the following is the NEXT step that the administrator should take?（）