why Data Packets have error checks

Understanding the psychology of data transmission over the internet network is a very complicated process. Sometimes it creates errors that affect or weakened the data transmission. And we see the data packets cause error checks.

In this write-up, we will exactly show you why data packets have error checks. And what are the facts that cause error checks of data packets?

Data packets are the mandatory source of messages transmitted over a digital network. After reading this article, you will come to know what are data packets and why these data packets have error checks.

If you are in a hurry, you can jump to the below sub-sections by clicking on them.

So, let’s dive right in.

Table of Contents

Before digging deeper into the subject matter, we need to understand some additional concepts that fall under the topic territory.

What are data packets?

Data packets are small segments of large messages that travel from one place to another in secured encrypted form. Data packets are the mandatory unit of communication over the digital network. It is the set of related information that is grouped and travels over a computer network.

The packets aren’t the data itself, but it encloses and collects the information that travels in grouped form. Data packets consist of small segments of a long message because it is dangerous to carry the whole message in one file. It may be hunted by hackers sometimes.

Data packets are used to transmit the data, to reduce the hacker’s attack chance, and make the transmission system quick. Data packets are also called a datagram, segments, cells, or blocks of information.

why do data packets have error checks?

Data packets have error checks because when the checksum number detects some errors in the destination position of packets it shows error checks. Error checks are notified when the file or payload (data of the packet) has been corrupted on its journey during transmission.

Error checks in data packets can be detected, when there are corrupted files found during data transferring on the receiver or destination position.

A checksum number is made up of the calculation of the data packets, their correct answer, and their order when packets are received by the destination computer or source device.

When the calculation data is unable to run and cannot produce a correct answer, we can say that data packets have error checks. And we understand that data has been corrupted on its journey during transmission.


Data transmission is a complicated procedure from the sender system to the receiver source. When the data splits during transmission into different packets, the sequence number allows the cells (packets) to reorder or rebuilt it by putting the packets back into a special sequence.

After data transmission, the sender source (computer or another device) notifies the data whether it arrived safely or not. If the packets arrived corrupted, the destination computer shows error checks on data packets. The computer which has been sent the data is asked to send it again.

To understand the psychology of data packets you need to understand the 4 basic layers where the data transmission takes place. These can be discussed in the below table.

Image by slidesplayer.com

The data packets need the correct destination where they transmit the data over different channels and routes and then it is reached the correct location.

During the data transmission data has been passed through 3 stages, the header, body, and footer. Let’s discuss it in detail in the below lines.


The header consists of instructions about the data being carried out through packets. These instructions include the length of the file, packet number, position of the packets, originating IP address of the packets, and protocol address (the address that identifies a device on the internet).


In this part, there is the real data that delivering from the sender or origin to the destination. Payload is the carrying capacity of transmission data or other packets. Payloads mean how much data a packet can carry to the destination position.


The footer contains a checksum/parity bit to check errors and ensures the complete data packet has been delivered to the destination computer.

There is a couple of other parity bits that tell the receiving device that the data has been reached successfully from the sender source.


Data packets are the basic units of data transmission where data can be transmitted to its destination. After the data transmission, the sender source notifies the data whether it was transmitted completely and safely or not.

If the packet data reached corrupted, the destination computer shows error checks on data packets.

You have almost covered your desired topic. You understood easily why Data Packets have error checks.

Now, it’s your turn to ask a question if you have not captured the entire concept from the above article.

Tell me whether this article was helpful or not and why.

I would like to hear back from you in the comments section right now.

Leave a Comment