🚀 JWT vs Sessions

Both are used for user authentication. 
But they handle user state differently.


1️⃣ Session-Based Authentication 🗂️

Server stores session data.

➤ How: Login → Server creates session ID → Stored in cookie 
➤ Server checks session on each request 
➤ Wins: Easy to invalidate 
➤ Risk: Requires server storage 

Best for:
Traditional web apps


2️⃣ JWT (JSON Web Token) 🔐

Client stores authentication token.

➤ How: Login → Server sends JWT → Client stores token 
➤ Token verified on each request 
➤ Wins: Stateless, scalable 
➤ Risk: Harder to revoke before expiry 

Best for:
APIs, microservices, mobile apps


💡 Key Difference

Session → Stateful (server stores data) 
JWT → Stateless (client stores token) 

Sessions = Easier control 
JWT = Better scalability