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

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

• A. It translates IP addresses to domain names.
• B. It translates domain names to IP addresses.
• C. It reserves IP addresses for devices.
• D. It manages email routing.

Answer: (B)

DNS translates domain names into IP addresses, letting computers locate the exact server on the network. When you type a web address, your device asks a DNS resolver to find the numeric IP address for that domain so the browser can connect. This naming system makes it easy to reach sites without memorizing strings of numbers, and the results are often cached to speed up future lookups. There is reverse DNS, where an IP is mapped back to a domain, but that isn’t the primary purpose. DNS also helps with email routing via MX records, directing mail to the right mail servers, but that use is a specific application of DNS rather than its main job. IP address reservation is handled by other systems like DHCP, not DNS.

DNS translates domain names into IP addresses, letting computers locate the exact server on the network. When you type a web address, your device asks a DNS resolver to find the numeric IP address for that domain so the browser can connect. This naming system makes it easy to reach sites without memorizing strings of numbers, and the results are often cached to speed up future lookups. There is reverse DNS, where an IP is mapped back to a domain, but that isn’t the primary purpose. DNS also helps with email routing via MX records, directing mail to the right mail servers, but that use is a specific application of DNS rather than its main job. IP address reservation is handled by other systems like DHCP, not DNS.