(Universally Unique Identifier). In technical environments, these IDs are used to uniquely identify specific features, assets, or records within a software system or database.
The clock_seq_hi_and_res field (the first two digits of the fourth block: ec ) tells us the variant. The variant defines the layout of the UUID. Bits 6 and 7 of the clock_seq_hi_and_res must be 10 for RFC 4122 compliance. ec in binary ( 11101100 ) fits the standard variant (10x). Therefore, this is a valid RFC 4122 UUID.
If two different servers create a user at the same time, they might both assign them ID #100. 63ff8c51-79c3-08aa-ec89-5e1ff8b35d98
Assigned to a web browser when a user logs into a secure banking or e-commerce application to authenticate their requests without forcing them to re-enter credentials on every page click.
63ff8c51 - 79c3 - 08aa - ec89 - 5e1ff8b35d98 [Time] [Time] [Time] [Clock] [Node] Low Mid Hi/Ver Seq ID (MAC) The component breakdown includes: The low 32 bits of the timestamp. (Universally Unique Identifier)
[User Action] ──> [API Gateway] ──> [Generated Token: 63ff8c51...] ──> [Distributed Microservices] │ ├──> Log Tracking ├──> Database Primary Key └──> Session Cache
A standard UUID is a 128-bit number typically represented as 32 hexadecimal digits, displayed in five groups separated by hyphens: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx . The variant defines the layout of the UUID
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const v4: uuidv4 = require('uuid'); // Generate identifier console.log(uuidv4()); Use code with caution.