“There are just 4 billion possible IP addresses if we do not
move from version 4 of the Internet Protocol to version 6. After
the move, there would be 340 trillion trillion trillion (3.4 x
10**36) possible addresses under v6, because of the 128-bit address
space. Scalability is just one reason to make the move,
but the new levels of security that could be achieved – quite apart
from much better network management, especially for mobile devices
– make the move highly desirable.”
“A further benefit of switching to IPv6 would be to get better
and more reliable performance.”