单项选择题 An administrator needs to add fault tolerance capabilities to a server. Which of the following is the BEST solution to accomplish this?（）

单项选择题 WhichofthefollowingistheBESTsequencetobaremetalrestoreaserver？（）

单项选择题 WhichofthefollowingportsshouldbeallowedthroughafirewallforTelnettofunction？（）