CompTIA
SY0-301 · Question #831
SY0-301 Question #831: Real Exam Question with Answer & Explanation
The correct answer is B: MD5 and SHA-1. MD5 and SHA-1 are both lightweight hashing algorithms, and using them together for file integrity verification provides dual cross-validation with minimal bandwidth overhead.
Question
When verifying file integrity on a remote system that is bandwidth limited, which of the following tool combinations provides the STRONGEST confidence?
Options
- AMD5 and 3DES
- BMD5 and SHA-1
- CSHA-256 and RSA
- DSHA-256 and AES
Explanation
MD5 and SHA-1 are both lightweight hashing algorithms, and using them together for file integrity verification provides dual cross-validation with minimal bandwidth overhead.
Common mistakes.
- A. 3DES is an encryption cipher, not a hashing algorithm, and combining MD5 with an encryption cipher does not provide file integrity verification - it introduces unnecessary complexity.
- C. While SHA-256 and RSA together provide strong integrity and authentication, RSA asymmetric operations add significant computational and bandwidth overhead unsuitable for a bandwidth-limited remote link.
- D. AES is a symmetric encryption algorithm, not a hashing function, so combining SHA-256 with AES does not provide meaningful file integrity verification in the context described.
Concept tested. File integrity verification using hash algorithms
Reference. https://learn.microsoft.com/en-us/windows/win32/seccng/hash-and-mac-algorithms
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