| TCP | UDP |
|---|---|
| TCP is a connection-oriented protocol | UDP do not establish a connection between devices before transmitting data |
| It is more reliable as it guarantees the delivery of data to the destination | The delivery of data to the destination cannot be guaranteed in UDP |
| TCP is heavy-weight | UDP is lightweight |
| Retransmission of lost packets is possible in TCP | Retransmission of lost packets is not possible in UDP |
| TCP is slower | UDP is faster, simpler, and more efficient than TCP |
| TCP provides flow control and acknowledgement of data | UDP is efficient for broadcast and multicast type of network transmission |
| Order/ sequence of data is preserved is TCP | There is no sequencing of data in UDP |
| TCP can be used to sending mail | UDP can be used to stream video |
| TCP is used by HTTP, HTTPs, FTP, SMTP and Telnet | UDP is used by DNS, DHCP, TFTP, SNMP, RIP, and VoIP |