IPv6

"Address extension" and "starting over"
16 bytes = 3.4 x 10^38
Some technologies are mandatory
Plug and play
End-to-end security (i.e. IPsec)

65,536 subnets (minimum) for everybody
Class A (in the old term) per site

Reducing external routing information to 8,192
Aggregatable global addresses from the start

End-to-end and bidirectional communication
IPv6 is a NAT-free world
Paradigm change for applications
Cellular phone, automobiles, home network, game machines, ...