What is a data packet? | Data packet structure

history of internet

If we talk about internet, then of course the term comes to transfer data from one computer to another through network. If we talk about data, then of course the term data packet comes to mean that the whole internet is dependent on data packets or network packets. No matter what data you send or receive on the Internet, it spreads across the network in a packet switching manner, while your data spreads across your network but does not contain a single piece of data, it splits into thousands or millions of pieces. And in this article I will discuss in detail the data packets, the blocks that transport your data on the Internet!

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Data packet

When you download a photo from the Internet or a web page from a web server, your data is not loaded into your browser as a single piece. In fact, numerous pieces of web pages are received on your computer and each piece is put together and then a complete web page is displayed to you. The network on which this data reaches or can be sent to you in pieces is called a packet switch network. So what is a data packet? – You can say, network packets or these data packets are the basic units for any communication in a digital network. Before data is transmitted over the Internet, the data split into numerous pieces and spreads to the destination, these pieces of data are called data packets or network packets.

data packet

However, a much more efficient network can be created by sending multiple packets at once than sending a single data to the network as complete data. This makes it possible to access your data much faster and more efficiently. I gave an example earlier to explain how packet switching works on the Internet, so that you can get a good idea of ​​why data packets are needed.

Suppose you live in America and plan to move to Germany. Suppose you are thinking of bringing not only your belongings but also your building with you. But think of a nightmare where you are carrying your whole house from one end of the earth to the other. So what do you have to do? The first step is to look for a road that you can easily travel along. Then you will need some trucks and you will need a special ship to cross the sea. Think about how difficult the whole thing became. And you will go back a few days to carry so much together. Because your destination will be much slower. Again, if someone else tries to come on the same road, he will also get stuck. In fact, the circuit switching system works in a similar way, and this is how telephone calls are made.

Now imagine another situation, suppose you demolished your building and numbered every brick. Fill each brick with an envelope and send it to your destination one by one. Some may have gone by ship and some may have gone by air. Then when all the bricks have arrived together, the numbers of the bricks will be matched to make the previous building again. Since the bricks have traveled on different roads, there will be no traffic jams and others will be able to use the same road at the same time.

This way the server load is reduced by sending the data in packet form and they can reach the destination much faster. When you send an email message to your friend, it breaks down into many bytes and moves to the destination. These packets then travel through different routes and finally reach the original receiver. The packets are reassembled on the receiver’s computer and returned to the previous data.

Data packet structure

Now each data packet has a special structure, embedded in different types of data, packets of different protocols are prepared in a different structure. Usually each packet has two special items, packet header and payload. The packet header contains some of the original data, service information, and transmission information. Moreover, the source IP address is also encoded in the data packet, which makes it easy to understand from which computer or server the data has been sent. The destination IP address is also added to the packet to determine where the data will reach.

Then the most important thing is that the information is encoded between the packets to create a complete packet. As a result, even if the data on your computer is received as a piece, it can automatically return to its previous position and you do not have to worry about how the data came to be.

The structure of the data packet depends on which protocol it will be transmitted to. For example: VoIP calls work over IP protocols. Data is transmitted over an Ethernet network via an Ethernet frame. In IP protocol, network packets reach their destination through different nodes. Node here means devices and routers. Routers currently play many special roles in IP protocols. The router hides many devices under its control, first the router receives the data packets from the server and then efficiently distributes the packets to the devices connected to it. On the other hand, data packets are also sent using TCP. We especially know it as TCP / IP. In this protocol data packets are controlled, many times when data is sent after the packet is lost, then duplicate packets are sent.

So you understand, the data is sent in packets on the Internet or any digital network, be it text, call, image, video, audio, whatever. Every data is collected again when it reaches our device, so you will see, when you use slow internet and load any large size image, the images open little by little, then at once the whole image comes out.


Hopefully, from this basic article, you can easily get an idea of what a data packet or network packet is and how important it really is. If you have any questions about this, please let me know in the comments below.

Sabik Al Mahmud

There was a fascination with technology from a very young age, and perhaps that fascination is a little more than other ordinary people. From Nokia's button phones to infinity display bezel-less smartphones, everything is my favorite. Technology has never been more impressive in my life. And writing started with an interest in this technology .....

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