Networking - Technology
Gateway
A controlled entry point that connects networks or systems and manages what passes between them
What's it for?
Controls and directs what passes between two systems or networks.
For example…
Mobile apps call one API gateway; behind it, orders, stock and payments are separate services
A payment gateway receives card details from the website, sends them to the payment network and returns the result without exposing every internal step
Think of it like…
Airport security and departure gates — everything crosses a controlled boundary before entering another zone