Technology architecture - Technology
System architecture
The high-level design of a particular system, showing its main components and how they interact
What's it for?
Shows how the main parts of one system fit together so changes can be designed consistently.
For example…
Before adding mobile access, the team reviews the system architecture so the same rules apply on phone and desktop
A system architecture for a customer portal shows its web front end, API services, database and identity component and how requests move between them
Think of it like…
Floor plan for one building, showing rooms and how you move between them