Which activity involves querying registries to determine domain ownership and contact information?

Which activity involves querying registries to determine domain ownership and contact information?

• A. ARIN
• B. Nslookup
• C. Whois
• D. Nmap

Answer: (C)

The activity being asked about is using Whois. Whois is the service that queries the registries and registrars behind domain names to reveal who registered a domain and how to contact them. It also provides details like the registrar, creation and expiration dates, and sometimes the administrative and technical contacts, depending on data visibility. This is why it’s the best fit: domain ownership and contact information are the primary data that Whois is designed to expose. Other tools serve different purposes—Nslookup looks up DNS records to map domain names to IPs, Nmap scans networks and discovers open ports or services, and ARIN is a regional registry that manages IP address allocations rather than domain ownership details.

The activity being asked about is using Whois. Whois is the service that queries the registries and registrars behind domain names to reveal who registered a domain and how to contact them. It also provides details like the registrar, creation and expiration dates, and sometimes the administrative and technical contacts, depending on data visibility.

This is why it’s the best fit: domain ownership and contact information are the primary data that Whois is designed to expose. Other tools serve different purposes—Nslookup looks up DNS records to map domain names to IPs, Nmap scans networks and discovers open ports or services, and ARIN is a regional registry that manages IP address allocations rather than domain ownership details.