多项选择题
An administrator has shut down a server to install additional memory. When the administrator restarts the server after the upgrade， it times out. Which of the following could be the cause of the problem？（）
A. Processor failure B. Third party memory C. Disk drive failure D. ESD during the upgrade E. Backplane failure
单项选择题 Which of the following protocols is responsible for the resolution of IP addresses to MAC addresses?（）
单项选择题 Whichofthefollowingserverrolessendsoutatimesignalforclientstosynchronizewithaclock？（）
单项选择题 Which of the following storage interface protocols has the FASTEST speeds?（）
