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The main difference between TCP and UDP

The main difference between TCP and UDP


What is TCP?

TCP/IP helps you determine how a particular computer is connected to the Internet and how you can transfer data between them. It helps you to create a virtual network when you connect multiple computer networks.

TCP/IP stands for Transmission Control Protocol/Internet Protocol. It is specifically designed as a model for delivering a highly reliable end-to-end byte stream over an unreliable Internet.

In this tutorial on the differences between TCP and UDP, you will learn:

What is UDP?

UDP is a datagram oriented protocol. It is used for broadcast and multicast type of transmission network. The full form of UDP is a user datagram protocol (a datagram is a transport unit associated with a packet-switched network.) The UDP protocol works almost similarly to TCP, but it subtracts all the error-checking elements, all the backend elements and the -IV interfacing and delivery.

The main differences:

  • TCP is a connection-oriented protocol, while UDP is a connection-oriented protocol.
  • TCP speed is slower while UDP speed is faster
  • TCP uses handshake protocol like SYN, SYN-ACK and ACK while UDP does not use handshake protocols
  • TCP does error checking and also error recovery, on the other hand, UDP performs error checking, but it ignores the wrong packets.
  • TCP contains acknowledgment segments, but UDP does not contain any acknowledgment segment.
  • When we compare TCP vs. UDP, TCP is heavy and UDP is lightweight.

How does TCP work?

A TCP connection is established with the help of a three-way handshake. It is the process of initiating and recognizing communication. Once the connection is established, the data transmission begins, and when the transmission process ends, the connection is terminated by closing an existing virtual circuit.

How does UDP work?

UDP uses a simple transmission method without the implied handshake, request, reliability, or data integrity dialogs. UDP also assumes that error checking and correction are not important or are performed in the application, to avoid overloading such processing at the network interface level. It is also compatible with broadcast and multicast packets.

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TCP Features

Here are some important features of TCP:

  • Delivery acknowledgments
  • Re-transmitter
  • Delays transmission when network is congested
  • Detect errors easily

Here are some important features of UDP:

  • Supports bandwidth-intensive applications that tolerate packet loss
  • less delay
  • It sends the largest amount of packets.
  • Possibility of data loss
  • Allows small transaction (DNS lookup)

The difference between TCP and UDP

Here are the main differences between UDP vs TCP:

The difference between UDP and TCP

It is a connection-oriented protocol. It is an offline protocol.
TCP reads the data as streams of bytes, and the message is carried to the boundary of the segment. UDP messages contain packets that have been sent one by one. It also checks integrity at the time of arrival.
TCP messages make their way across the Internet from one computer to another. It does not depend on connectivity, so one program can send a lot of packets to another.
TCP rearranges data packets in the specified order. UDP does not have a fixed order because all packets are independent of each other.
TCP speed is slower. UDP is faster as no error recovery is attempted.
Header size is 20 bytes Header size is 8 bytes.
TCP is heavy. TCP needs three packets to set up a socket connection before sending any data to the user. UDP is lightweight. No tracking contacts or requesting messages etc.
TCP checks for errors and also recovers errors. UDP checks for errors, but ignores the wrong packets.
Clips of thanks and appreciation There are no thank you clips
Use a handshake protocol such as SYN, SYN-ACK, and ACK No handshake (connectionless protocol)
TCP is reliable because it ensures that the data is delivered to the destination router. Delivery of data to the destination in UDP cannot be guaranteed.
TCP provides extensive error checking mechanisms because it provides flow control and data acknowledgment. UDP contains a single error-checking mechanism that is used for checksums.
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TCP Applications

Here are the applications of TCP:

  • It helps you to establish/set up a connection between different types of computers.
  • It works independently of the operating system
  • Supports many routing protocols.
  • It enables the internet between organizations.
  • It can be run independently.
  • Supports many routing protocols.
  • TCP can be used to establish a connection between two computers.

UDP applications

Here are the implementations of UDP:

  • The UDP method is largely used by time-sensitive applications as well as by servers that answer small inquiries from a larger client base.
  • UDP is compatible with broadcast packets for transmission over the network and for multicast transmission.
  • It is also used in Domain Name System, VoIP, and online gaming.

Advantages of TCP

Following are the features/benefits of TCP:

  • It helps you to establish/set up a connection between different types of computers.
  • It works independently of the operating system.
  • Supports many routing protocols.
  • It enables the internet between organizations.
  • The TCP/IP model features a highly scalable client-server architecture.
  • It can be run independently.
  • Supports many routing protocols.
  • It can be used to establish a connection between two computers.

Advantages of UDP

Here are the advantages/benefits of UDP:

  • It never restricts you to a contact based contact form; This is the reason for low startup latency in distributed applications.
  • The recipient of UDP packets gets these packets unmanaged, which also includes block limits.
  • Broadcast and multicast are also available with UDP
  • Data can be lost
  • Small transaction (DNS lookup)
  • Bandwidth intensive application withstand packet loss
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Disadvantages of TCP

The following are the disadvantages of using TCP:

  • TCP never terminates transmission without an explicit request for all moving data.
  • You cannot use it for broadcast or multicast.
  • There are no limits for TCP, so you have to create your own.
  • TCP offers many features that you would not want. Bandwidth, time or effort may be wasted.
  • In this model, the transport layer does not guarantee the delivery of packets.
  • Replacing the protocol in TCP / IP is not easy.
  • It does not offer a clear separation of its services, interfaces, and protocols.

UDP disadvantages

Here are the cons/disadvantages of UDP:

  • In UDP, a packet may not be delivered or delivered twice. It may be delivered disabled, so you don’t get any indication.
  • Routers are completely deprecated with UDP, so they never retransmit if they collide.
  • UDP does not have congestion control and flow control, so implementation is the task of the user application.
  • UDP mostly likes to suffer packet loss worse

When do you use UDP and TCP?

Now, let’s compare the TCP and UDP protocols:

  • TCP is an ideal option, and even comes with an overhead, so, when most of the load is in the connection, your application stays online for any length of time.
  • UDP is ideal for use with multimedia such as VoIP.
  • Use TCP sockets when both the client and server send packets independently at that time; Accidental delay is acceptable. (for example, online poker).
  • You have to use user UDP if both client and server can send packets separately, accidental delay is also not acceptable. (for example, multiplayer games).

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