SCARCITY OF IP ADDRESS

This dynamic IP address used to work as a relatively "are rare" is. In theory, there are "only" 4.3 billion different numbers available, and even less in practice because of certain limitations for specific purposes are used.

So, for example, we give a unique IP address of each person on our planet if we wanted could.

Fortunately, "reduction" is only the IP addresses that currently the largest type (IPv4, or 4 above) applies to used.

An improved version (IPv6) has been created that offer 4 billion times 4 billion times 4 billion times 4 billion different numbers, in practice, that one IP address almost "infinite" is!

However, for IPv6, for ISPS and web hosts need to invest in new equipment to switch, so that some more years for us to be around IPv4 can expect.

Consequently, ISPS and Web hosts often try to limit the number of IP address that they provide to customers, customers from a group sharing the same address.

We have already seen how ISPS For this purpose, use dynamic IP address, web host, something like "name based virtual hosting" use.