What is the role of DNS servers?

• A. To facilitate the name resolution process for domain names
• B. To host web content
• C. To manage wireless access points
• D. To encrypt DNS queries

Answer: (A)

DNS servers translate human-friendly domain names into the numeric addresses that devices use to reach services. This name-resolution process is what lets a browser or app connect to the correct server when you type a URL. In practice, your device asks a DNS resolver, which queries DNS servers in a hierarchy until it finds the IP associated with the domain, and then the connection proceeds using that IP. So the primary role of DNS servers is to facilitate the name resolution process for domain names.

Hosting web content is the job of web servers, not DNS servers. Managing wireless access points is handled by wireless controllers or access points themselves, not DNS. While DNS can be used with secure transport (DNS over TLS/HTTPS) to encrypt queries, the core function of DNS servers remains name resolution.