A systems administrator has retrieved the latest copy of the system backup files, which had been stored offsite at a third-party vendor. The systems administrator wants to validate that the data was…

MD5 generates a 128-bit hash value that acts as a unique fingerprint for the data. If the backup files were altered in any way since the original hash was recorded, the MD5 computed after retrieval will differ, immediately flagging tampering or corruption. This is the industry-standard approach for backup integrity validation because it is deterministic and detects even single-bit changes.

SCP is a secure file transfer protocol; using it copies files but does not validate whether their contents were modified since the backup was originally created.

rsync synchronizes files between locations but does not provide cryptographic proof of integrity - it identifies differences based on size or modification timestamps, which can be bypassed or missed.

Restoring from the last full backup replaces current data rather than verifying integrity, and does not confirm whether the retrieved backup files themselves were modified while offsite.