Which statement about DNS is true?

Which statement about DNS is true?

• A. It translates IP addresses to domain names.
• B. It translates domain names to IP addresses.
• C. It manages router tables.
• D. It provides end-to-end encryption for HTTP.

Answer: (B)

DNS is the system that lets us use easy-to-remember names like example.com and have them turned into the actual numbers computers use to connect, the IP addresses. When a browser needs to reach a site, your device asks a DNS resolver to find the IP associated with that domain. The resolver then queries a chain of servers (root, then top-level domain, then the authoritative server) to obtain the correct IP, often storing the result in a cache to speed up future requests. This name-to-address translation is what makes the web human-friendly and reachable. The other statements don’t fit because router tables are managed by routers and routing protocols, not DNS, and end-to-end encryption for HTTP is provided by TLS/HTTPS, not by DNS. (There are encrypted DNS options, but that’s separate from the basic role described.)

DNS is the system that lets us use easy-to-remember names like example.com and have them turned into the actual numbers computers use to connect, the IP addresses. When a browser needs to reach a site, your device asks a DNS resolver to find the IP associated with that domain. The resolver then queries a chain of servers (root, then top-level domain, then the authoritative server) to obtain the correct IP, often storing the result in a cache to speed up future requests. This name-to-address translation is what makes the web human-friendly and reachable.

The other statements don’t fit because router tables are managed by routers and routing protocols, not DNS, and end-to-end encryption for HTTP is provided by TLS/HTTPS, not by DNS. (There are encrypted DNS options, but that’s separate from the basic role described.)