What is the primary function of DNS?

What is the primary function of DNS?

• A. It resolves domain names to IP addresses
• B. It stores user credentials for authentication
• C. It routes emails between servers
• D. It translates domain names to domain aliases

Answer: (C)

DNS translates human-friendly domain names into the numeric IP addresses that computers use to locate resources on the network. When you type a domain, DNS provides the corresponding IP so your device can connect to the correct server. This name-to-address resolution is what makes the web usable, since we don’t memorize IPs. DNS can also supply other data, like MX records to help mail servers find recipients or CNAME records to create aliases, but those are supplemental features built on the same system. Storing user credentials is handled by authentication services, not DNS. Routing emails between servers is performed by mail transfer processes that use DNS to find the recipient’s mail server, not by DNS itself. The essential function is resolving domain names to IP addresses.

DNS translates human-friendly domain names into the numeric IP addresses that computers use to locate resources on the network. When you type a domain, DNS provides the corresponding IP so your device can connect to the correct server. This name-to-address resolution is what makes the web usable, since we don’t memorize IPs. DNS can also supply other data, like MX records to help mail servers find recipients or CNAME records to create aliases, but those are supplemental features built on the same system. Storing user credentials is handled by authentication services, not DNS. Routing emails between servers is performed by mail transfer processes that use DNS to find the recipient’s mail server, not by DNS itself. The essential function is resolving domain names to IP addresses.