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TCP vs. UDP: Understanding the Key Differences

TCP vs. UDP: Understanding the Key Differences

Jun 03, 2024
2 mins read
AV

Ankit Verma

Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) are both protocols of the Transport Layer Protocols. TCP is a connection-oriented protocol whereas UDP is a part of the Internet Protocol suite, referred to as the UDP/IP suite. Unlike TCP, it is an unreliable and connectionless protocol.

TCP ensures reliable and ordered delivery of packets, making it suitable for applications where data integrity is crucial. On the other hand, UDP is faster and more efficient for time-sensitive applications but does not guarantee delivery.

Here are the key differences between TCP and UDP

Feature/AspectTCP (Transmission Control Protocol)UDP (User Datagram Protocol)
TypeConnection-orientedConnectionless
ReliabilityHigh (guarantees delivery)Low (no guarantee of delivery)
SpeedSlower due to error checkingFaster, no error checking
OverheadHigher (due to additional features)Lower (minimal header size)
Error CheckingYes (error detection and correction)No
Flow ControlYesNo
HandshakeThree-way handshake (SYN, SYN-ACK, ACK)None
Use CasesWeb browsing, email, file transfersLive streaming, online gaming, VoIP

Pros and Cons

ProtocolProsCons
TCP
  • Reliable data delivery
  • Error recovery
  • Flow control
  • Slower speed
  • Higher overhead
UDP
  • Faster data transmission
  • Low overhead
  • Unreliable
  • No flow control

Applications

ProtocolApplications
TCPWeb browsing, email, file transfers
UDPLive video streaming, online gaming, VoIP

In summary, TCP is ideal for applications where reliability and data integrity are crucial, such as web browsing, email, and file transfers. On the other hand, UDP is suitable for applications where speed is more important than reliability, such as live video streaming, online gaming, and VoIP (Voice over Internet Protocol).

Understanding the differences between TCP and UDP can help you choose the right protocol for your specific needs.

Stay tuned for our next article!