Every device which is connected to the web has a special identifier referred to as IP (Internet Protocol) address. This includes personal computers, web servers, smart phones, switches, and so on. The pool of IP addresses, which was introduced initially, has already been distributed, so the so-called IPv4 IP addresses are slowly getting replaced with IPv6 addresses. Every domain that opens a website has an IP record, which is the address of the server where it is hosted. With the IPv4 system, the record is called A and it consists of four groups of numbers from 1 to 255 separated by a dot, while within the IPv6 system it is called AAAA and it consists of 8 groups of hexadecimal numbers i.e. this type of records use digits 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 works with a considerably larger amount of IPs in comparison with the IPv4 format.