In DNS, a Resource Record serves what purpose?

• A. It provides information about a domain, such as its IP address.
• B. It stores user credentials for domain ownership.
• C. It maps physical hardware to IP addresses.
• D. It encrypts DNS queries.

Answer: (A)

Resource Records are the fundamental data units in DNS that describe facts about a domain. Each record provides information used to resolve a name to a resource, most commonly the IP address it should map to. For example, an A record links a domain to an IPv4 address, while other types like AAAA, MX, or CNAME serve different purposes, but all are still pieces of a domain’s DNS data. When a resolver asks for a domain, it retrieves the relevant resource records to know where to connect or how to route services.

This is why the statement that a Resource Record provides information about a domain, such as its IP address, is the best choice. It captures the core function: storing the data necessary to map names to resources. Other options don’t fit DNS’s role—the system doesn’t store user credentials, it doesn’t map to physical hardware, and DNS records themselves aren’t about encryption (though DNS can be transported securely with separate mechanisms).