What are the differences between TCP and UDP protocols in network communication?

Main differences between TCP and UDP protocols:

• Reliability: TCP provides reliable data delivery, guarantees order and error checking. UDP is unreliable, does not guarantee delivery or order.
• Connection establishment: TCP establishes a connection through a three-way handshake, UDP is connectionless.
• Speed: UDP is faster as it has no overhead for connection setup and acknowledgment.
• Usage: TCP is suitable for applications where reliability is important (web, email), UDP is used for streaming video, gaming, where speed is crucial and some loss is acceptable.

Example: TCP is used for file transfer, while UDP is used for voice calls.