Y7

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3a: Define what a computer network is

Keyword	Definition
computer	electronic device for storing and processing data
data	binary 0s and 1s that can represent text, images, sound or videos
network	two or more computers connected together
receive	getting data from another computer
transmit	sending data to another computer

3b: Explain how data is transmitted between computers across networks

Keyword	Definition
bandwidth	a measure of how much data can be sent per second
data	digital signals that can represent images, text, sound or video
network	two or more computer systems connected together
protocol	set of rules for computers to follow when sending and receiving data
receive	getting data from another computer
transmit	sending data to another computer
wireless	a network that uses radio to send data rather than wires

3c: Define 'protocol' and provide examples of non-networking protocols

Keyword	Definition
protocol	set of rules

3d: List network hardware

Keyword	Definition
hub	device used to forward data to all connected devices
network	two or more computers connected together
router	intelligent device used to forward data to the correct network or device
server	always-on device that other computers can connect to in order to request data

3e: Compare wired to wireless connections

Keyword	Definition
3G	slow type of wireless network used for mobile devices
4G	fast type of wireless network used for mobile devices
5G	super fast type of wireless network used for mobile devices
Ethernet	type of wired network
WiFi	type of wireless network used for homes or businesses

3f: Define 'bandwidth', using the appropriate units for measuring the rate at which data is transmitted

Keyword	Definition
bandwidth	the measure of how much data can be transferred per second over a network
bit	single zero or one (off or on) used to store data
bps	bits per second
byte	combination of 8 zeros and ones used to measure size of data
Gbps	giga bits per second (1,000,000,000 bits per second)
Kbps	kilo bits per second (1,000 bits per second)
Mbps	mega bits per second (1,000,000 bits per second)

3g: Define what the internet is

Keyword	Definition
data	text,images,sound, videos or any other information
Internet	interconnected network of networks that follows the TCP/IP protocol for sending and receiving data
network	two or more computers connected together
protocol	set of rules for transmitting data

3h: Explain how data travels between computers across the internet

Keyword	Definition
IP	Internet Protocol used to find a route from one computer to another over the Internet
IP Address	the location of a computer on the Internet
MAC Address	unique ID for any device on the Internet
Protocol	set of rules for sending and receiving data
TCP	Transfer Control Protocol used to split data into packets

3i: Describe key words such as 'protocols', 'packets', and 'addressing'

Keyword	Definition
Addressing	Keeping track of who has sent and who will receive data over a network so it goes to the right computer
Network Protocol	set of rules for sending and receiving data over a network
Packet	Small chunk of data sent or received over a network

3j: Explain the difference between the internet, its services, and the World Wide Web

Keyword	Definition
Email	a service which allows people to send text and files to each other over the Internet
Instant messaging	a service which allows people to chat via text messages over the Internet
Internet	an international network of interconnected networks
VoIP	a service which allows people to speak to each other over the Internet
Web Browser	software which allows people to browse web pages over the Internet
WWW	a service which allows people to browse web pages over the Internet

3k: Describe how services are provided over the internet

Keyword	Definition
App	program that is downloaded and run on a personal device
Service	program that runs in the cloud but that people can use from their personal devices
The cloud	lots of servers connected to the Internet to provide digital services
The Internet	international computer network made up of lots of networks connected together
Web page	a resource that you can view in a web browser

3l: Explain the term 'connectivity'

Keyword	Definition
access point	device or connector which allows you to connect to a network
buffering	when your network connection is not fast enough to receive all the data you need for live audio / video
connectivity	whether or not you have access to a network connection
signal strength	how well a computer can pick up a wireless network (related to how close you are to an access point)

3m: Describe how internet-connected devices can affect me

Keyword	Definition
automation	internet connected devices can save you from having to do boring or, difficult or repetitive tasks
cost	internet connected devices can be expensive
manufacture	internet connected devices can use rare raw materials or be made in factories that don't treat people well
power	internet connected devices need electricity to run which costs money and can be bad for the environment
privacy	personal data can be collected or shared by internet connected devices
recycling	internet connected devices can damage the environment if they are not disposed of correctly

3n: Explain how the IoT can collect and share information about me with or without my knowledge

Keyword	Definition
Default password	the security settings that are set up on smart devices when they are made
Firmware	the software that runs on smart devices
IoT	Internet of Things (smart devices connected to the Internet)
Privacy	how much personal data a smart device shares over the Internet

3o: Describe components (servers, browsers, pages, HTTP and HTTPS protocols, etc.) and how they work together

Keyword	Definition
HTML	language used to describe the content and structure of web pages
HTTP	insecure protocol for transmitting data over the WWW
HTTPS	secure protocol for transmitting data over the WWW
URL	web address used to browse to a page or file over the WWW
web browser	software which allows you to view web pages over the WWW
web page	information that you can view over the WWW
web server	an always-on computer which you can connect to in order to request web pages over the WWW
WWW	a service which allows you to view web pages over the Internet