What is the primary role of DNS?

The primary role of DNS, or Domain Name System, is to convert human-readable domain names into numeric IP addresses that computers use to communicate with each other over the internet. When you type a web address into your browser, DNS translates that easy-to-remember name (like www.example.com) into an IP address (like 192.0.2.1) which is necessary for routing the request to the correct server. This process is crucial for navigating the internet, as it allows users to access websites without needing to remember complex numeric addresses.

The other options do not align with DNS's primary function. Storing email data pertains more to email servers and protocols rather than DNS. Managing database queries relates to how databases process requests, which is unrelated to the name resolution provided by DNS. Providing security for networks typically involves firewalls and security protocols, which again does not fall under the responsibilities of DNS. Thus, the correct understanding of DNS's role highlights its importance in the usability of the internet.