Which hash function outputs a 128-bit digest?

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Study for the EC-Council Network Defense Essentials Test. Utilize flashcards and multiple-choice questions, with each question accompanied by hints and explanations. Prepare effectively for your examination!

Multiple Choice

Which hash function outputs a 128-bit digest?

Explanation:
Digest length is what this question tests. MD5 produces a 128-bit digest, which is 16 bytes and is commonly shown as 32 hexadecimal characters. The other options generate longer outputs: SHA-256 yields 256-bit digests, and SHA-3 variants typically offer 256, 384, or 512-bit digests. Even the generic SHA reference historically points to digests longer than 128 bits. So MD5 is the only one here that outputs exactly 128 bits. (Note: MD5 is not recommended for security-critical uses due to vulnerabilities, but the question focuses on output size.)

Digest length is what this question tests. MD5 produces a 128-bit digest, which is 16 bytes and is commonly shown as 32 hexadecimal characters. The other options generate longer outputs: SHA-256 yields 256-bit digests, and SHA-3 variants typically offer 256, 384, or 512-bit digests. Even the generic SHA reference historically points to digests longer than 128 bits. So MD5 is the only one here that outputs exactly 128 bits. (Note: MD5 is not recommended for security-critical uses due to vulnerabilities, but the question focuses on output size.)

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