Every single device that is connected to the Internet has a distinctive identifier referred to as IP (Internet Protocol) address. This includes computer systems, web servers, smartphones, switches, and so on. The pool of IP addresses, that was introduced initially, has already been distributed, therefore the so-called IPv4 IP addresses are progressively getting replaced with IPv6 addresses. Every domain which opens a website has an IP record, that is the address of the server where it's hosted. When using the IPv4 system, the record is called A and it consists of four sets of numbers from 1 to 255 divided using 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 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 is designed for a significantly greater number of IPs in comparison with the IPv4 format.