What information is required for a WHOIS query?

  • outside global address of the client
  • FQDN of the domain
  • ICANN lookup server address
  • link-local address of the domain owner
Explanation & Hint:

To perform a WHOIS query, which is a protocol used to query databases that store the registered users or assignees of an internet resource such as a domain name, IP address block, or an autonomous system, you generally need the following information:

  • FQDN of the domain: The Fully Qualified Domain Name (FQDN) is commonly used to perform a WHOIS query to find out information about the domain registration, such as the domain owner, registration dates, and the nameservers associated with the domain.

The other options are not typically used for a WHOIS query:

  • Outside global address of the client: This refers to a public IP address that is assigned to a device on a network, translating the private IP address to a global address. This information is not necessary for a WHOIS query.
  • ICANN lookup server address: While ICANN (Internet Corporation for Assigned Names and Numbers) provides a WHOIS lookup service, you do not need to know the specific server address to perform a query. You can go to the ICANN website or use various WHOIS lookup tools available online.
  • Link-local address of the domain owner: Link-local addresses are used in a local network segment and are not routable or registered globally. WHOIS queries do not use or provide link-local addresses.

Typically, a WHOIS query is performed using a domain name or an IP address to find out ownership and registration information.

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