Each device that's connected to the Internet has a special identifier referred to as IP (Internet Protocol) address. This includes personal computers, web servers, smart phones, switches, etcetera. The pool of IPs, which was introduced initially, has been distributed, hence the so-called IPv4 IP addresses are progressively getting replaced with IPv6 addresses. Every domain which opens a site has an IP record, which is the address of the server where it's hosted. Using the IPv4 system, the record is called A and it comprises of four groups of numbers from 1 to 255 separated using a dot, while in the IPv6 system it is called AAAA and it comprises of 8 sets of hexadecimal numbers i.e. this type of records use numbers 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 compared with the IPv4 format.
