Câu 92: 210-260: CCNA Security Implementing Cisco Network Security

In a brute-force attack, what percentage of the keyspace must an attacker generally search through until he or she finds the key that decrypts the data?

1. A. Roughly 50 percent — đáp án hiện tại
2. B. Roughly 66 percent
3. C. Roughly 75 percent
4. D. Roughly 10 percent