Which technique is used to create an exact copy of the entire storage media for forensic analysis?

• A. Make a bit-level copy
• B. One-to-one copy
• C. Backing up log files
• D. Restore and repair any damage

Answer: (A)

Bit-level copying, also known as sector-by-sector imaging, is the process used to create an exact replica of the entire storage media for forensic analysis. It copies every bit in every sector, including unallocated space, slack space, and remnants of deleted files, ensuring nothing is left out. This exact copy lets investigators preserve the original evidence and perform analysis on the duplicate while maintaining the chain of custody, often verified by cryptographic hashes and protected with a write blocker on the source. The other options don’t fit because a one-to-one copy is a vague term that might refer to a simple backup and could omit unallocated space or metadata; backing up log files isn’t a full-image capture of the drive, and restoring and repairing damage is about recovery, not producing a forensically sound image.