CompTIA Server+

Answer - A - Jack should use an Extended ECC memory module on his server setup to be able to use the checksum operation.

Key Takeaway: All memory devices are configured as N x 4 bits. If the memory hardware failure occurs in the memory device, four bits of data are lost. Therefore, if data is stored in contiguous memory locations, a failure in the memory device causes a 4-bit error, in which case the erratic data cannot be restored. Extended ECC stores data in noncontiguous memory locations. If the memory device breaks down, a 1-bit error will occur at four locations. Since 1-bit errors can be corrected reliably by ECC, data can be restored, even when a memory device breaks down.