Internet Protocol Version 6 (IPv6) is a revision designed to upgrade the old IPv4 system as it ran out of available network addresses. Instead of 4 sets of decimal numbers separated by periods (“.”) used by IPv4, IPv6 uses eight sets of alpha-numeric hexadecimal numbers.

This minor change produces a virtually unlimited number of unique IP addresses. It also provides more efficient routing, better security, and eliminates many network problems such as duplicate addresses assigned to different devices.

When the phone system runs out of telephone numbers, one of the simplest solutions is to add one more digit or create new area codes. This is similar to what IPv6 does for Internet addressing.

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