Certified Ethical Hacker (CEH) Practice Question

The tester cannot retrieve data through the same HTTP response channel and cannot rely on timing differences. By coercing the database to initiate a DNS request that carries the extracted data, the attacker uses a separate communication channel. This technique is classified as out-of-band SQL injection. Boolean-based and time-based blind methods depend on in-band responses or timing, while second-order attacks store a payload for later execution within the database itself, not for immediate data exfiltration via DNS.