What is a UUID?
A Universally Unique Identifier (UUID) is a 128-bit label used for information in computer systems. When generated according to the standard methods, UUIDs are for practical purposes unique.
Understanding UUID Versions
There are several versions of UUIDs. The most common are:
- Version 1: Generated from a time and a node ID (usually the MAC address).
- Version 4: Generated from random or pseudo-random numbers.
Common Use Cases
UUIDs are widely used in software development for database keys, transaction IDs, and any other scenario where a unique identifier is required.