Understanding Cisco Cybersecurity Operations Fundamentals (CBROPS) — Question 242

An analyst performs traffic analysis to detect data exfiltration and identifies a high frequency of DNS requests in a small period of time. Which technology makes this behavior feasible?

Answer options

• A. access control list
• B. NAT
• C. encryption
• D. tunneling

Correct answer: D

Explanation

Tunneling enables the encapsulation of data within DNS requests, making it possible to exfiltrate information without raising immediate suspicion. Access control lists, NAT, and encryption do not facilitate the high-frequency DNS requests indicative of data exfiltration in the same way that tunneling does.