9.1. Operating Internet Protocol Version 6
The number of people and devices that connect to networks increases daily. This is a terrific thing; we find new and exciting ways to communicate with more people all the time. The major problem with all this communication was that IPv4 is running out of addresses. IPv4 only has about 4.3 billion addresses available and not all of those can be used. Only about 250 million of those addresses can be assigned to devices. Sure, the use of CIDR and NAT helped to extend the time, but it is going to happen. Consider that there are about 6.5 billion people in the world today. It is estimated that just over 10 percent of that population is connected to the Internet. Under IPv4, there wasn't enough address space ...
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