AWS Certified Solutions Architect – Professional — Question 660

Auto Scaling requests are signed with a _________ signature calculated from the request and the user's private key.

Answer options

• A. SSL
• B. AES-256
• C. HMAC-SHA1
• D. X.509

Correct answer: C

Explanation

AWS Auto Scaling query requests are signed using HMAC-SHA1, a hash-based message authentication code that ensures request integrity and authenticity. SSL is a transport-layer security protocol, AES-256 is a symmetric encryption standard, and X.509 is a digital certificate standard, making them incorrect for this specific request-signing mechanism.