With IPv6 you assign a /64 to the network. All networks in IPv6 are 64 bits long, with 64 bits assigned to the host's interface ID. There are lots of ways for

With IPv6 you assign a /64 to the network. All networks in IPv6 are 64 bits long, with 64 bits assigned to the host's interface ID. There are lots of ways for a host to generate an Interface ID - (http://technet.microsoft.com/en-us/library/cc736439(v=ws.10).aspx http://technet.microsoft.com/en-us/library/cc736439(v=ws.10)...) is a nice reference.