TCP vs UDP: What is the difference?

Are you searching on the web about TCP vs UDP? If the answer is yes, you are on the right article. Why? Because today, we will explore the TCP, UDP, and their main difference. If that answers your search, let’s start this adventure.

TCP – Definition

The Transmission Control Protocol (TCP) is a data transmission standard used by software programs. It’s designed for efficiency rather than speed. Data packets might get lost or arrive out of sequence in data transfer. TCP ensures that every packet reaches its intended destination and, if necessary, is reconfigured. TCP will request the retransmission of lost data if a packet does not reach its goal within a defined interval. It is in charge of the connection between the two programs. This occurs throughout the conversation. The purpose is to make sure that both parties send and receive everything that has to be sent and that everything is correct. TCP is a widely used network communication protocol.

What exactly is UDP?

The User Datagram Protocol (UDP) is a communications protocol that allows devices and networks to communicate with one another. Its primary and most appealing characteristic is its high-speed connection.

It’s a valuable protocol for tasks that require a lot of time and speed, such as DNS lookups or video transfers.

UDP was first introduced in 1980, and it has remained a vital component of the Internet’s productivity toolset ever since.

TCP vs UDP – Comparison

So, we’ve arrived at the subject of our article: TCP vs UDP. You now have a basic understanding of the Transmission Control Protocol and the User Datagram Protocol. Let’s have a look at the fundamental distinctions between them.

  • Type of service. On the other hand, TCP is a connection-oriented protocol, whereas UDP is a connectionless protocol.
  • Reliability. Because it secures data delivery to the destination gateway, TCP is trustworthy. Data delivery is not guaranteed via UDP.
  • Speed. The comparison that follows is based on speed. Contrary to TCP, which is slower, UDP is somewhat faster, more straightforward, and more efficient.
  • Resubmission. The User Datagram Protocol does not allow for data packet retransmission. The only protocol that allows this is TCP.
  • Protocols. TCP is used by HTTP, HTTPs, FTP, SMTP, and Telnet. On the other hand, DNS, DHCP, TFTP, SNMP, RIP, and VoIP all use UDP.
  • Information flow. TCP allows data to travel both ways, making it a full-duplex protocol. On the other hand, UDP is best suited to unidirectional data transmission.

After learning the differences between TCP and UDP, you might be asking yourself, “Which one should I choose?” Because they are both ideally suited to specialized applications, deciding between UDP and TCP is simple. TCP is the way to go if accuracy and dependability are critical. If speed is a priority, UDP is the way to go.


So, which protocol is favorable: UDP or TCP? It all relies on what you want to do with them, as it does in any case. UDP must be used if you need a quick and consistent data transmission for a program to function correctly. On the other hand, TCP is a robust and reliable protocol for transporting data without losing any of it.

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