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单选题
An administrator needs to add fault tolerance capabilities to a server. Which of the following is the BEST solution to accomplish this?（）
A
Move the architecture from 32-bit to 64-bit.
B
Install a PBX card.
C
Install a second NIC card.
D
Install a fail-over cable.
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考题
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Move the architecture from 32-bit to 64-bit.B
Install a PBX card.C
Install a second NIC card.D
Install a fail-over cable.
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