What service translates domain names to IP addresses?

• A. DHCP
• B. DNS
• C. ARP
• D. NAT

Answer: (B)

DNS translates domain names into IP addresses, allowing systems to reach resources using human-friendly names. When you enter a website URL, your device asks DNS servers to resolve the domain to its numeric address, typically returning an IPv4 address (A record) or an IPv6 address (AAAA record) so the connection can be established. This name-to-address lookup is essential for everyday Internet access and is often accelerated by caching and hierarchical delegation through recursive resolvers and authoritative servers.

The other services don’t perform this translation: DHCP assigns IP addresses and other network configuration to hosts; ARP maps IP addresses to MAC addresses on a local network; NAT translates private IP addresses to public ones for Internet access. Therefore, DNS is the service responsible for translating domain names to IP addresses.