What is the difference between IPv4 and IPv6?

IPv4 and IPv6 are versions of the Internet Protocol (IP) used to transmit data on the Internet. The main difference between IPv4 and IPv6 is the number of IP addresses available.

IPv4 uses 32-bit addresses and can therefore provide a maximum of 4.3 billion unique addresses. However, given the ever-increasing number of devices connected to the Internet, this number is no longer sufficient to address all devices worldwide.

IPv6, on the other hand, uses 128-bit addresses and can theoretically provide more than 340 sextillion (10 to the power of 38) unique addresses. This is enough to give every single grain of sand on earth its own IP address. IPv6 also offers other improvements over IPv4, such as enhanced security, QoS functionality, built-in multicast support, and more.

IPv6 is becoming more common, but IPv4 is still in widespread use and will be around for a long time before a full migration to IPv6 occurs.