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TCP vs. UDP – What is the difference between TCP and UDP?


TCP and UDP are the most widely used communication protocols in the Internet protocol stack. One ensures that the data you send is received accurately. The other transfers data swiftly. The importance of accuracy against speed decides whether an application uses TCP or UDP.

Before getting started with the differences between the two, let us first get to know what they mean, and ponder over the topics we will cover in this blog:

Table of Content

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What do TCP and UDP mean?

On the other hand;


It is a protocol used to establish connections. It is a protocol that does not necessitate the establishment of a connection.
TCP receives data in the form of bytes streams and transmits messages to segment boundaries. UDP communications consist of packets that are sent one at a time. It also checks for integrity as it arrives.
TCP messages are transmitted from one computer to another via the internet. Because it does not rely on connections, one software can send a large number of packets to another.
TCP rearranges data packets in the given order. The UDP protocol has no predefined sequence because every packet is independent of one another.  
TCP operates at a slower rate. UDP is faster because error recovery is not performed.

Characteristics of TCP

Characteristics of TCP

TCP provides the following critical features:

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Characteristics of UDP

Characteristics of UDP

TCP Function

The source and destination TCP endpoints initiate a TCP conversation using a three-way handshake:

At the source, TCP isolates data arriving from the application layer. Each piece of data is encased in a header to form a TCP segment. One of the ten necessary fields in the TCP header is the Sequence Number. Each new segment is given an SN that is one higher than the SN of the previous part.

How Does UDP Function?

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Performance of TCP vs. UDP

The advantage of UDP over TCP is that its lack of ‘acknowledgment’ allows for a continuous packet stream. Because a TCP connection always acknowledges a series of packets (whether it is entirely trustworthy or not), each negative acknowledgment in which a data packet is lost must be retransmitted.

UDP, on the other hand, avoids the added overheads of TCP transport, making it more efficient in terms of bandwidth and significantly less demanding of slow networks.

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TCP Ports: What Are They and How Do They Work?

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UDP Ports: What Are They and How Do They Work?

Your acquaintance is entirely responsible for getting the information you’re seeking to send. Your acquaintance may only hear parts and pieces or nothing at all because you have not yet established a connection.

Applications for TCP

Applications for TCP

TCP are used for the following purposes:

Applications for UDP

Applications for UDP

UDP is used for the following purposes:

Advantages of TCP

TCP provides the following benefits:

Advantages of UDP

UDP provides the following benefits:


After reviewing the distinctions between TCP and UDP, it is clear that any organization that uses virtual communications can gain significantly from UDP. UDP not only avoids the transport traps and overcrowded networks that TCP is prone to, but it also provides exceptional speed for all of your streaming requirements. Furthermore, by enabling UDP for Lifesize, organizations gain improved workflows, cheaper overhead, and fewer interruptions all around, making this pairing a true win-win.

If you have any more doubts, do feel free to contact our Cyber Security Community!

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