Every single device that is connected to the Internet has a special identifier called IP (Internet Protocol) address. This includes personal computers, web servers, smartphones, switches, etcetera. The pool of IP addresses, that was introduced originally, is already distributed, so the so-called IPv4 IP addresses are slowly getting replaced with IPv6 addresses. Every domain name which opens a website comes with an IP record, which is the address of the server where it is hosted. When using the IPv4 system, the record is called A and it comprises of four groups of numbers from 1 to 255 split up using a dot, while within the IPv6 system it is called AAAA and it is comprised of eight groups of hexadecimal numbers i.e. this kind of records use numbers from 0 to 9 and letters from A to F. An example 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 compared with the IPv4 format.