The DNS (Domain Name System) is in a way the telephone directory of the Internet. Internet users access information online through domain names (for example, nytimes.com or espn.com), while browsers interact through Internet Protocol (IP) addresses. DNS translates domain names into IP addresses so that browsers can load web resources. Each device connected to the Internet has a unique IP address that other devices use in order to find it. Thanks to DNS servers, Internet users do not have to memorize IP addresses (for example, 192.168.1.1 in IPv4) or newer and more complex alphanumeric IP addresses (for example, 2400: cb00: 2048: 1 :: c629 : d7a2 in IPv6).