SY0-301 Question #483: Real Exam Question with Answer & Explanation

The correct answer is D: MD5. MD5 (and other cryptographic hash functions) are used to validate the integrity of a downloaded program by comparing its computed hash against a known-good hash published by the vendor. A mismatch indicates tampering or corruption.

Question

Users report that after downloading several applications, their systems' performance has noticeably decreased. Which of the following would be used to validate programs prior to installing them?

Options

AWhole disk encryption
BSSH
CTelnet
DMD5

Explanation

MD5 (and other cryptographic hash functions) are used to validate the integrity of a downloaded program by comparing its computed hash against a known-good hash published by the vendor. A mismatch indicates tampering or corruption.

Common mistakes.

A. Whole disk encryption protects data stored on a drive from unauthorized access but does not provide any mechanism to validate whether a program has been tampered with before installation.
B. SSH (Secure Shell) is a protocol for encrypted remote access and secure file transfer and is not used to verify the integrity of software packages prior to installation.
C. Telnet is an unencrypted remote access protocol that provides no security features and cannot be used to validate the integrity of files or applications.

Concept tested. File integrity validation using MD5 hashing

Reference. https://csrc.nist.gov/projects/hash-functions

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