Which term describes the method of detecting errors in data transmission using checks such as parity and CRC?

Which term describes the method of detecting errors in data transmission using checks such as parity and CRC?

• A. Error checking
• B. Error codes
• C. Dynamic DNS (DDNS)
• D. Dumpster diving

Answer: (A)

Error detection in data transmission relies on adding extra information so the receiver can verify that the data arrived intact. Parity bits provide a simple check by indicating whether the number of 1s in a block is even or odd, helping catch single-bit flips. CRC, or cyclic redundancy check, uses polynomial calculations to produce a checksum that can detect a wide range of errors in larger data blocks. This collection of techniques is called error checking (error-detection) because its purpose is to detect, not correct, errors that may have occurred during transmission. The other terms don’t fit: Dynamic DNS is about updating domain-to-IP mappings, dumpster diving refers to stealing information from discarded materials, and error codes are status indicators in communications that report problems rather than methods for detecting payload errors.

Error detection in data transmission relies on adding extra information so the receiver can verify that the data arrived intact. Parity bits provide a simple check by indicating whether the number of 1s in a block is even or odd, helping catch single-bit flips. CRC, or cyclic redundancy check, uses polynomial calculations to produce a checksum that can detect a wide range of errors in larger data blocks. This collection of techniques is called error checking (error-detection) because its purpose is to detect, not correct, errors that may have occurred during transmission. The other terms don’t fit: Dynamic DNS is about updating domain-to-IP mappings, dumpster diving refers to stealing information from discarded materials, and error codes are status indicators in communications that report problems rather than methods for detecting payload errors.