유니크한 식별 번호를 사용하는 용도로 사용되는 ID ex) 사용자 uid 또는 product, post 등의 udi

• UID

  Unique Id

  over time with respect to the host that it was generated on

  Generated UID: 3e336481:14ed674b5d1:-8000

• UUID Universally Unique Identifier cryptographically strong pseudo random number generator

  Generated UUID : 4e4deff9-b027-4359-8ad5-320e429b5739

• client-side id vs server-side id https://www.techyourchance.com/client-generated-ids-vs-server-generated-ids/