单项选择题 A user is unable to connect to the companys intranet server by FQDN, but can connect by IP address. Other users are not having a problem. An administrator verifies that the user can successfully ping the server by IP address and can properly resolve the FQDN using nslookup. The problem is persisting after running ipconfig /flushdns. Which of the following should the administrator do NEXT?（）

单项选择题 AWindowsserverhasrebootedbyitselfseveraltimes.Thereareseveralfunctioningnon-Windowsserversinthesamerackthatareconnectedtothesameuninterruptiblepowersupply（UPS）.WhichofthefollowingistheMOSTlikelycauseofthereboots？（）

单项选择题 WhichofthefollowingdescribesaserverthatishostingonlyanAnti-virusprogram？（）