CompTIA Server+

Answer - D - Server RAMs require Error Checking and Correction, or ECC, to prevent memory errors.

Key Takeaway: ECC allows data that is being read or transmitted to be checked for errors and when necessary, corrected on the fly. It differs from parity-checking in that errors are not only detected, but also corrected. The most commonly-used error correcting code, SECDED Hamming code, allows a single-bit error to be corrected and double-bit errors to be detected.