Cisco Cyber Security Practice Exam

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Enhance your Cisco Cyber Security knowledge. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your Cisco Cyber Security Exam with our comprehensive quiz!

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Which algorithm produces a 128-bit hash value?

  1. SHA-256

  2. SHA-512

  3. MD5

  4. AES

The correct answer is: MD5

The algorithm that produces a 128-bit hash value is MD5 (Message-Digest Algorithm 5). MD5 was designed by Ronald Rivest in 1991 and produces a fixed-length 128-bit hash value, typically represented as a 32-character hexadecimal number. Its primary purpose is to ensure data integrity by generating a unique hash for data input, allowing users to check for changes or corruption. In terms of context, SHA-256 and SHA-512 are cryptographic hash functions from the SHA-2 family; SHA-256 produces a 256-bit hash, while SHA-512 produces a 512-bit hash. AES, or Advanced Encryption Standard, is actually a symmetric encryption algorithm rather than a hashing algorithm, used for encrypting data rather than generating hash values. Therefore, among the given options, MD5 is the only algorithm that generates a 128-bit hash value.

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