Dell EMC Specialist – Systems Administrator, PowerMax — Question 7

What is the difference between S3 authentication signature version 2 and S3 authentication signature version 4?

Answer options

• A. Version 2 uses a shared secret and access key ID Version 4 uses the date/region algorithm
• B. Version 2 uses HMAC algorithm Version 4 uses the credentials scope algorithm
• C. Version 2 uses a namespace based signature Version 4 uses HMAC algorithm
• D. Version 2 uses the secret key to sign the request Version 4 uses a signing key

Correct answer: B

Explanation

The correct answer is B because S3 authentication signature version 2 uses the HMAC algorithm for signing requests, while version 4 utilizes the credentials scope algorithm, which incorporates a more complex signing process. Options A, C, and D incorrectly describe the mechanisms used in each version, leading to inaccuracies about how the signatures are generated.