This situation was compounded by making poor decisions in issuing the address in the first place, and by the fact that many scopes of these addresses are or have been reserved for private or "well known" use. Thus, we hit the first of the largest hurdles in internetworking in the history of the technology: 4,294,967,296 unique addresses are just not enough.
The current IPv4 addressing model has served us well, but when it was initially being developed 40 or so years ago, none of the researchers could have possibly imagined a future where so many individuals, organizations, and devices would require an IP Address on a daily, almost hourly, basis. Most notably, we can point to the current IPv4 addressing issues we are facing on the internet today. In the networking field, things change so very quickly that it is hard to keep up. CompTIA Network+ N10-005 LiveLessons (Video Training)
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