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Which of the following provides data the best fault tol…

Which of the following provides data the best fault tolerance at the LOWEST cost?

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A.
Load balancing

B.
Clustering

C.
Server virtualization

D.
RAID 6

Explanation:
RAID, or redundant array of independent disks (RAID). RAID allows your existing servers to have more than
one hard drive so that if the main hard drive fails, the system keeps functioning. RAID can achieve fault
tolerance using software which can be done using the existing hardware and software thus representing the
lowest cost option.

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