small chunks of a whole file that are sent (transmitted) over a network. Each packet contains a header and a payload

part of a packet that contains addressing and other data

part of a packet that contains the message being sent

Data packets

Computing

In this unit pupils explore how data is transferred over the internet. They will examine addressing and the makeup and structure of data packets. They will investigate how the internet facilitates online communication and collaboration and how to communicate responsibly on the internet.

Communication and the internet

What is the name for a small chunk of data sent across a network?

Data is sent all at once in one big file.

Data is split into packets and sent separately.

Which statement is correct about how data travels over the internet?

It can travel different routes and be resent if lost.

Why is it better to send data in packets rather than as one big file?

the unique number given to this specific packet

the total number of packets in the whole message

the address of the device sending the packet

the address of the device meant to receive the packet

Match each part of a packet header to its correct description:

What is the part of a data packet that carries the actual information being sent across a network?

What is the main role of a Domain Name Server (DNS)?

What is the name for the unique number given to each device on a network?

What do the letters “IP” stand for in the term “IP address”?

What do you usually type into your browser to visit a website?

finding the IP address for a website name

helping your computer connect to websites

changing the background colour on your screen

Starter Quiz