HTTP/HTTPS/SSL

HTTP = HyperText Transfer Protocol

It’s the protocol used for communication between a client and a server.

Browser
   │
   │ HTTP request
   ▼
Server
   │
   │ HTTP response
   ▼
Browser

Example:

GET /users

The browser asks the server for users, and the server responds.

HTTPS = HTTP + encryption

The S means Secure.

HTTP
  ↓
HTTP + TLS encryption
  ↓
HTTPS

So instead of:

GET /login
password=123456

being sent in plain text, the communication is encrypted.

You see it in URLs like:

https://example.com

SSL = Secure Sockets Layer

SSL was the older technology used to secure network communication.

Today, TLS (Transport Layer Security) is used instead. People still commonly say “SSL” even when they actually mean TLS.

So technically:

HTTPS
  ↓
HTTP
  +
TLS

Think of sending a letter:

HTTP
📄 ───────────────→ Server
   readable letter
 
 
HTTPS
🔒📄 ─────────────→ Server
    locked/encrypted letter

Term	What it is
HTTP	Protocol for communicating over the web
HTTPS	HTTP secured with TLS
SSL	Older security technology; replaced by TLS
TLS	Modern encryption/security protocol used by HTTPS

So when you see HTTPS, think:

“HTTP communication, but protected by TLS encryption.”

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