What is the role of the Domain Name System (DNS)?

What is the role of the Domain Name System (DNS)?

• A. Routes packets
• B. Encrypts data
• C. Registers domains
• D. Translates names to IP addresses

Answer: (D)

The key idea here is that DNS translates human-friendly web addresses into the numeric addresses computers use to connect on the Internet. When you type a domain like example.com, your device asks a DNS resolver to find the IP address for that domain. The resolver checks with root, top-level domain, and authoritative servers to get the exact IP, and then your browser can reach the correct server. DNS helps with both IPv4 and IPv6 addresses and often uses caching to speed up lookups. This isn’t about routing packets, which is handled by routers and the Internet Protocol. It isn’t about encrypting data, which is done by encryption protocols like TLS. And registering a domain is done through registries and registrars, not by DNS itself.

The key idea here is that DNS translates human-friendly web addresses into the numeric addresses computers use to connect on the Internet. When you type a domain like example.com, your device asks a DNS resolver to find the IP address for that domain. The resolver checks with root, top-level domain, and authoritative servers to get the exact IP, and then your browser can reach the correct server. DNS helps with both IPv4 and IPv6 addresses and often uses caching to speed up lookups.

This isn’t about routing packets, which is handled by routers and the Internet Protocol. It isn’t about encrypting data, which is done by encryption protocols like TLS. And registering a domain is done through registries and registrars, not by DNS itself.