What is DNS used for?

• A. Mapping IP addresses to MAC addresses.
• B. Encrypting domain names for privacy.
• C. Translating domain names into IP addresses.
• D. Blocking DNS traffic.

Answer: (C)

Domain Name System is about converting human-friendly domain names into the numeric addresses computers use to reach servers. When you type a website, your device asks DNS to find the IP address for that domain, so routing can send the traffic to the correct server. This name-to-address translation is essential because networks route packets based on IPs, not names. DNS works as a distributed database with servers that cache results to speed up lookups, typically returning IPv4 or IPv6 addresses and sometimes aliases for other names. The other ideas—mapping addresses to MACs, encrypting domain names for privacy, or merely blocking DNS—aren’t what DNS is designed to do.