Each device which is connected to the Internet has a specific identifier referred to as IP (Internet Protocol) address. This includes computers, web servers, smart phones, switches, and so on. The pool of IP addresses, that was introduced originally, is already distributed, therefore the so-called IPv4 IP addresses are steadily getting replaced with IPv6 addresses. Every domain name that opens a site comes with an IP record, that is the address of the server where it is hosted. Using the IPv4 system, the record is called A and it comprises of four groups of numbers from 1 to 255 divided by a dot, while within the IPv6 system it is called AAAA and it is made up of 8 groups of hexadecimal numbers i.e. this type of records use numbers from 0 to 9 and letters from A to F. An illustration of an AAAA record is 2010:0c48:43d3:2142:1012:8c3a:2475:2435 and this format is designed for a substantially larger amount of IPs in comparison with the IPv4 format.