TCP/IP Configuration IPv6 Addresses In this lesson we cover the new IPv6 forthcoming and why we need more than the 4.3 billion address that IPv4 currently offers. We contrast IPv4 which is a 32 bit address and IPv6 which is a 128 bit address, which will provide substantially more and how those are computed out. IPv6 will also be hexadecimal. They'll be configured as 8 groups of 4 bits, not the 4 groups of 8 bits IPv4 is. And we'll demonstrate what an IPv6 IP address might look like, which will be very long indeed.