Computer Science

a set of rules used to allow devices to communicate with each other

a set of rules that protects data when devices communicate with each other

a set of rules that controls how data is sent over the internet such as how it is addressed

Protocols

Internet fundamentals

How data travels across the internet

Network models

The TCP/IP model

Hosting services

Web technologies

Threats to networks

Network security

In this unit pupils will explore how data travels across the internet. They will explore how protocols define communication between devices and the purpose of common network protocols. They will investigate the risks to networks and the methods that can be used to protect a network.

The internet and web technologies

What is the term for a set of rules that devices follow to exchange information on a network?

the device communicates using the network protocol

Order the steps for a device joining a network:

a set of rules that protects data during transfer

a set of rules for addressing and sending data online

Which of the following is an example of a secure protocol?

What might happen if devices didn't use the same protocol?

Which protocol is responsible for addressing data sent over the internet?

What is the main function of a web browser?

What system matches domain names to the correct web page locations?

What is the term for a small part of a file sent across a network?

the DNS matches the address to the location

the browser requests the web page from the web server

the server sends data packets to the browser

Put these steps in order for accessing a web page:

servers that match domain names to web page locations

a small part of a file sent over a network

sending data in small packets along different routes

a computer that stores and serves web pages

to allow data to travel efficiently and avoid congestion

Why does the internet use packet switching?

Protocols

Lesson outcome