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多項(xiàng)選擇題

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

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單項(xiàng)選擇題

Which of the following protocols is responsible for the resolution of IP addresses to MAC addresses?（）

A. DHCP
B. ARP
C. DNS
D. RARP

單項(xiàng)選擇題

Which of the following server roles sends out a time signal for clients to synchronize with a clock？（）

A.DHCP
B.NTP
C.SMTP
D.DNS

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