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Internet & Networks

Summer Term 2

Imagine a world without computer networks: there would be no more YouTube, Google, instant messaging, online video gaming, Netflix, and iTunes; no online shopping; no file sharing; and no central backups of information. This unit begins by defining a network and addressing the benefits of networking, before covering how data is transmitted across networks using protocols.

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LESSONS

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Computer networks and protocols

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LESSON 4

INTERNET
An electronic communications network that connects computer networks and organisational computer facilities around the world.

NETWORK
A network is two or more computers (or other electronic devices) that are connected together, usually by cables or
Wi-Fi.

SERVER
A server is a powerful computer which provides services.

ROUTER
A router forwards messages from one network to another. It acts as a gateway.

NETWORK DIAGRAM
A visual representation of a computer  network.

HUB
A hub connects a number of computers together. 

ROUTER
A router forwards messages from one network to another. It acts as a gateway.

WIRED
Wired networks send data along cables.

WIRELESS
Wireless networks send data through the air using radio waves.

WIRELESS TECHNOLOGIES
 

Bluetooth

●WiFi

●3G (third generation wireless mobile)

●4G (fourth generation wireless mobile)

IP ADDRESS
a unique address that identifies a device on the internet or a local network.

Submarine Cable
A submarine communications cable is a cable laid on the sea bed between land-based stations to carry telecommunication signals across stretches of ocean and sea.

Week 5 

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