| Connection type | Connection-oriented (pehle connection banta hai) | Connectionless (no connection) |
| Reliability | Reliable (data loss nahi hota) | Not reliable (data loss ho sakta hai) |
| Error checking | Yes + error recovery | Yes but no recovery |
| Data Delivery Order | Ordered (sequence maintain hota hai) | Not ordered (random order aa sakta hai) |
| Speed | Slow (extra checking hoti hai) | Fast (kam checking) |
| Overhead | High | Low |
| Use Cases | Web browsing, file transfer, email | Video streaming, gaming, VoIP |
| Acknowledgment (ACK) | ACK required | No ACK |
| Flow Control | Yes | No |
| Congestion Control | Yes | No |
| Header Size | Large (20 bytes) | Small (8 bytes) |
| Examples | HTTP, HTTPS, FTP, SMTP | DNS, DHCP, Live streaming |