TCP/IP Configuration IPv6 Unicast Addresses While IPv6 addresses don't have classes per se, we do need to explore the different types they present, so let's begin with Unicast. Unicast is one-to-one relationship. There are several types of Unicast IPs: Link Local, Site Local, Unique Local & Global Unicast. We'll examine each Unicast address type, explore how and where they're used then discuss the functional differences of how they work and why those differences are necessary. For example, with Global Unicast IP Address, you can have a single globally routable P address similar to the IPv4's Public IP Address convention. So we'll demonstrate why and how that works, what the differences are and what the advantage will be under IPv6.