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Networks - Coggle Diagram
Networks
WIFI. Bluetooth, fibre optics, 4G and 5G
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Fibre Optics:
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• Only fibre to the junction box, then copper cables to your house
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WI-FI
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Called the internet, but there are other internets.
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WWW allows for the creation and accessing of web pages using HTML and HTTP (Hypertext markup language and Hypertext transfer protocol)
LAN and WAN
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A series of connections covering a large geographical area such as the world or a country or a city. Allows for wide area communication but has many connections so can be slow.
The computers in a WAN are connected by a telecommunications link, such as the public switched telephone network (PSTN).
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Advantages: Have the capability of accessing a vast and diverse range of multimedia resources and services.
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Users can use their access to manage bank accounts, shop online and communicate instantly with anyone.
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Security concerns: data theft, denial of service attacks (DDos attacks), spamming and hacking.
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Covers a small geographical area such as a single building, allows for very high-speed transmissions with low error rates.
This allows a range of devices to be on a LAN at the same time, for example tablets, PCs and laptops could all connect to the same network.
A LAN may be connected to a WAN, for example computers within a school could be connected to the internet.
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Programs can be stored on the network’s file server, allowing computers on the network to share software.
When an authorised user logs onto any computer on the network, they can access their own files, allowing flexible access from multiple locations.
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The initial costs of purchasing and installing file servers, network cabling and peripherals can be expensive.
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If the file server is damaged or breaks down, those files become inaccessible.
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Internet of things
Internet of Things: Term used to describe the increasing number of devices and appliances that connect directly to the internet.
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