Which technique provides information about the locations and types of servers?

• A. Load Balancer
• B. WAFW00F
• C. DNS Interrogation
• D. OWASP ZAP

Answer: (C)

DNS interrogation is the process of querying DNS to uncover the infrastructure behind a domain. By requesting records such as A/AAAA, NS, MX, SRV, and CNAME, you learn which IP addresses and hostnames are associated with a domain and which services live on which machines. This helps build a map of where different servers reside and what roles they serve (web, mail, other services). You can also infer approximate locations from IP addresses and see how services are distributed across the network. The other options don’t focus on discovering server locations and service types: a load balancer is a traffic-distribution device, WAF fingerprinting identifies firewall presence, and a web app scanner checks for vulnerabilities rather than inventorying server infrastructure.