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COMPONENT 01 - COMPUTER SYSTEMS
COMPONENT 01 - COMPUTER SYSTEMS
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.
LESSONS
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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