| Connection-Oriented Protocol | Connectionless Protocol |
| More Reliable | Less Reliable |
| Slower Transmission | Faster Transmission |
| Packets order can be PRESERVED or can be rearranged | Packets order is not fixed and packets are independent of each other |
| Uses THREE ways HANDSHAKE model for connection | No handshake for establishing the connection |
| TCP packets are heavy-weight | UDP packets are light-weight |
| Offers error checking mechanism | No error checking mechanism |
| Protocols like HTTP, FTP, Telnet, SMTP, HTTPS, etc use TCP at the transport layer | Protocols like DNS, RIP, SNMP, RTP, BOOTP, TFTP, NIP, etc use UDP at the transport layer |
