CompTIA Network+ (N10-007) — Question 313

A network technician receives a new firmware update for a network device. The technician wants to ensure the file has not been tampered with. Which of the following techniques should the technician use to ensure the integrity of the file?

Answer options

• A. Cyclic redundancy check
• B. System integrity check
• C. Hash comparison
• D. Root guard

Correct answer: C

Explanation

The correct answer is C, Hash comparison, as it allows the technician to verify the file's integrity by comparing its hash value with a known good hash. Option A, Cyclic redundancy check, can detect errors but is less reliable for tampering verification. Option B, System integrity check, pertains to the overall system rather than individual files, and Option D, Root guard, is related to preventing loops in a network rather than file integrity.