Middle Tier (AKA mid-tier)


It's a process that takes place in an Application Server

The application Server resides between users and the Database

User Machine <-----------> Application Server (middle Tier) <---------> Database

Middle Tier perform the Business logic

See Diagram 1 below:

                  Logical diagram of an N-tier architecture style



Reference:

  • PCMag: https://www.pcmag.com/encyclopedia/term/middle-tier
  • Diagram 1: https://docs.microsoft.com/en-us/azure/architecture/guide/architecture-styles/n-tier