How do IPv4 and IPv6 compare?
Both IPv4 and IPv6 addresses are used to identify a server's location and possibly identify other computers within a network. Assigned IP addresses allow those computers to find and communicate with other computers across a network.
The main difference between the IPv4 and IPv6 addresses is the number of available IP assignments each protocol can allow for or use. IPv4 provides 232, or a combination of 4,294,967,296 IP addresses and IPv6 can have approximately 3.4×1038 addresses which are a little more than 7.9×1028 times as many as IPv4! (that's a lot of math!)