Every single device which is connected to the world wide web has a specific identifier referred to as IP (Internet Protocol) address. This includes personal computers, web servers, smartphones, switches, etc. The pool of IPs, that was introduced originally, is already distributed, hence the so-called IPv4 IP addresses are slowly getting replaced with IPv6 addresses. Every domain name which opens a site 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 groups of numbers from 1 to 255 divided by a dot, while in the IPv6 system it's 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 example of an AAAA record is 2010:0c48:43d3:2142:1012:8c3a:2475:2435 and this format can handle a significantly larger number of IPs in comparison with the IPv4 format.