Difference Between TCP and UDP

By Aina Parasher|Updated : May 5th, 2022

Difference Between TCP and UDP: These are both connection protocols. TCP is a connection-oriented protocol, whereas UDP is a connectionless protocol. Their speed is a significant distinction. TCP is significantly slower than UDP. Because it is simpler and speedier, it has a lot more effective procedure. TCP, on the other hand, provides for the retransmission of lost data packets, while UDP does not.

Another significant difference between TCP and UDP is that UDP is not designed for end-to-end communication. TCP, on the other hand, sends data from the user to the server in the intended sequence (and vice versa). In truth, UDP does not assess the readiness of a recipient. Let us check the difference between TCP and UDP.

Table of Content

What is TCP?

Transmission Control Protocol (TCP) is a connection-oriented protocol, which means that once a connection is established, data may be delivered in both ways. TCP contains built-in mechanisms to check for faults and ensure that data is delivered in the order it was transmitted, making it ideal for transmitting data such as still photos, data files, and web pages.

The TCP protocol assures that data is received accurately, with no missing or incorrect data. If the TCP protocol is not utilized, erroneous or out-of-order data may be received. If we try to read a web page or download a file without utilizing TCP, for example, some data or graphics may be lost.

What is UDP?

The User Datagram Protocol (UDP) stands for User Datagram Protocol. It works similarly to TCP in that it is also used to transmit and receive messages. The primary distinction is that UDP does not require a connection. Connectionless indicates that no connection is established before communication takes place. It also does not ensure data packet delivery.

UDP is also known as the "fire-and-forget" protocol since it does not care if the data is received on the receiver's end. It's also known as the "fire-and-forget" protocol since it delivers data regardless of whether it's received. Because it does not give a guarantee for packet delivery, UDP is quicker than TCP.

What is the difference between TCP and UDP?

We have provided the difference between TCP and UDP listed in the table below.


Data transmission requires an established connection (the connection should be closed once the transmission is complete).

There are no criteria for initiating, maintaining or ending a connection in this protocol.
It is a network communication protocol that allows data to be exchanged between systems.
The data is transferred in packets in this method.
It incorporates error-checking, ensures delivery, and keeps the data packets in order.
It's the same as TCP, except that it doesn't ensure error checking or data recovery.
If you utilize this protocol, data will be delivered indefinitely, regardless of any problems at the receiving end.
TCP transmits data in a certain order, ensuring that packets arrive at the receiver in the correct order. On the other hand, because there is no data sequencing in UDP, the application layer must control the ordering.
TCP is slower than UDP because it performs error checking, and flow management, and gives delivery assurance. UDP is quicker than TCP because it does not guarantee data packet delivery.

Data is read in the form of a byte stream, and messages are sent to segment borders.

Individual UDP packets with defined limits are transmitted and verified for integrity upon arrival.
When a safe and dependable communication mechanism is necessary, this protocol is typically utilized. This protocol is used when quick communication is necessary but dependability is not a concern.


write a comment


  • The difference between TCP and UDP is that TCP can be used for data transfer between systems across a network. Packets are used for data transfer. TCP and UDP are comparable protocols. However, data recovery and error-checking services are not guaranteed.

  • TCP is a protocol for structuring data so that it may be transmitted securely between the server and the client. It ensures the integrity of all data transported through the network, regardless of its size. As a result, it's commonly used to send data from higher-level protocols that require all data to arrive.

  • The User Datagram Protocol, or UDP, is an Internet communication protocol that is used for time-critical transfers like video playing and DNS lookups. It saves time by avoiding the formal establishment of a connection before data is exchanged.

  • The reliability difference between TCP and UDP is that TCP is a dependable protocol since it ensures the delivery of data packets. UDP is an unreliable protocol since it does not provide a guarantee for packet delivery.

  • Based on the speed, the difference between TCP and UDP is that TCP is slower than UDP whereas, UDP is faster, simpler, and more efficient than TCP.

Follow us for latest updates