Implementing Cisco Network Security (IINS, legacy) — Question 29

What type of algorithm uses the same key to encrypt and decrypt data?

Answer options

• A. a symmetric algorithm
• B. an asymmetric algorithm
• C. a Public Key infrastructure algorithm

Correct answer: I, P

Explanation

The correct answer is A, a symmetric algorithm, because it utilizes the same key for both encryption and decryption processes, ensuring that the key must be kept secret. Options B and C are incorrect as they refer to asymmetric algorithms, which use a pair of keys (public and private), and Public Key Infrastructure, which is a framework for managing keys, not specifically an algorithm.