Câu 264: 312-50V13: Certified Ethical Hacker v13

John, a professional hacker, decided to use DNS to perform data exfiltration on a target network. In this process, he embedded malicious data into the DNS protocol packets that even DNSSEC cannot detect. Using this technique, John successfully injected malware to bypass a firewall and maintained communication with the victim machine and C&C server. What is the technique employed by John to bypass the firewall?

1. A. DNSSEC zone walking
2. B. DNS cache snooping
3. C. DNS enumeration
4. D. DNS tunneling method — đáp án hiện tại