Definition: IPv6, or Inter-Network Address Space, addresses millions of individual computers on the internet. It's a way to represent a network address in a 32-bit computer memory space for up to 128 million hosts. Definition: IP address is an address that identifies a specific network device with which you can communicate over your Internet connection and access resources provided by that device. In other words, IPv6 is a new type of internet protocol that allows multiple host computers to share the same IP address space. It provides improved flexibility for managing and addressing large numbers of devices on the internet.