An increase in checksum errors, often referred to by their specific type such as Cyclic Redundancy Check (CRC) errors, indicates that data has been altered or corrupted during its transmission, commonly due to noise or interference. This provides vital clues about physical layer disturbances or defective hardware. Other answer options like increasing runts or giants relate to concerns with packet sizes, while collision rates focus on network traffic issues, none of which directly imply integrity problems with the transmitted data itself.
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What are checksum errors and how do they indicate data corruption?
What are runts and giants, and how do they differ from checksum errors?
What is Cyclic Redundancy Check (CRC) and how is it used in networking?