Protocols¶
| HTTP | HTTPS | MQTT | COAP | |
|---|---|---|---|---|
| Full Form | Hyper Text Transfer Protocol | HTTP Secure | Message Queue Telemetry Transfer | Constraint Application Protocol |
| Client-Server Protocol | ||||
| Methodology | Document-Centric | Data-Centric | ||
| Architecture | Request/Response Protocol | Publish/Subscribe | ||
| Participants | - Client - Server | - Publisher - Broker - Subscriber | ||
| Complexity | Complex | Simple | ||
| Data Format | ASCII | Binary with 2B header | ||
| Message size | Large | Small | ||
| Port # | 80 8080 | 443 | 1883 | |
| Secure | ❌ | ✅ | ✅ | |
| Methods | GET PUT POST | |||
| Simple Lightweight | ||||
| Designed for constrained devices, low-bandwidth, high-latency, unreliable networks |