16 lines (13 loc) · 504 Bytes

Explanation

Usage

Web, [[HTTP]], [[DNS (Domain Name System)]], [[SSH (Secure Shell)]]
RPC (remote procedure call)
[[Relational Model|SQL]] and Database Protocols
APIs (REST/SOAP/GraphQL)

Not useful in

Notification service
Chatting application
Very Long requests
What if client disconnects?

Sources

Fundamentals of Backend Engineering - 7. Request Response