What does a DNS server do?

A DNS server primarily functions by converting human-readable domain names (like www.example.com) into IP addresses that computers use to identify each other on the network. This process is essential for navigating the internet, as users naturally prefer to remember names rather than numerical addresses. When you enter a website address in your browser, a DNS query is sent to the DNS server, which responds with the corresponding IP address, allowing your device to connect to the desired server hosting the website.

The other options focus on different networking functions. Leasing IP addresses to network clients pertains to DHCP servers, which handle the dynamic allocation of IP addresses. Connecting printers to a network typically involves print servers or various network configurations but is not a function of DNS. Storing emails for users is handled by email servers, which manage email accounts and allow for sending and receiving messages. Each of these processes is vital to networking but serves distinct purposes separate from the role of a DNS server.