CompTIA Security+ (SY0-501) — Question 151

If two employees are encrypting traffic between them using a single encryption key, which of the following algorithms are they using?

Answer options

• A. RSA
• B. 3DES
• C. DSA
• D. SHA-2

Correct answer: B

Explanation

The correct answer is B (3DES) because it is a symmetric encryption algorithm that uses a single key for both encryption and decryption. Options A (RSA) and C (DSA) are asymmetric algorithms that do not use a single shared key, while D (SHA-2) is a hashing algorithm and not used for encryption.