Every single device which is connected to the world wide web has a special identifier referred to as IP (Internet Protocol) address. This includes computers, web servers, smartphones, switches, etc. The pool of IPs, which was introduced at first, is already distributed, hence the so-called IPv4 IP addresses are gradually being replaced with IPv6 addresses. Every domain which opens a website comes with an IP record, that is the address of the server where it is hosted. When using the IPv4 system, the record is called A and it is made up of 4 sets of numbers from 1 to 255 split up 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 kind of records use numbers from 0 to 9 and letters from A to F. A good example of an AAAA record is 2010:0c48:43d3:2142:1012:8c3a:2475:2435 and this format can handle a significantly bigger number of IPs compared with the IPv4 format.