What does DNS do?

• A. Translates IP addresses to domain names.
• B. Provides DHCP configuration.
• C. Forwards traffic between networks.
• D. Resolves names to IP addresses (A/AAAA/CNAME records).

Answer: (D)

DNS takes human-friendly names and turns them into the numeric addresses computers use to reach the right host. When you type a domain like example.com, DNS looks up its IP address so the network stack can route the request. It does this using A records for IPv4 addresses, AAAA records for IPv6 addresses, and CNAME records which are aliases that point to another domain that will resolve to an IP. The process may involve recursive lookups and caching to speed future requests. Note that translating IPs back to names is a reverse lookup done with PTR records, and DHCP or routing serve different roles in networks.