24 lines
1.5 KiB
Markdown
24 lines
1.5 KiB
Markdown
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# Sum up in 10 lines how the Internet developed
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The Internet originally was a decentralized military network called
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ARPANET that interconnected military sites across the USA.
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Its development began in the 1960s, during the Cold War, in order to have a functioning communications network even if one of the nodes got taken down by a Russian attack.
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The network was later connected to all the universities in the US, thanks to the new TCP/IP protocol suite.
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The network kept expanding: multiple countries joined it, and thanks to the creation of the World Wide Web by Tim Berners-Lee a whole world of new opportunities was opened and led to the spread of the Internet in both homes and companies.
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# Sum up in 10 lines how the Internet works
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The Internet is composed of millions of devices called routers whose task is
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directing the data towards its destination.
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This task is fulfilled by the IP protocol through a technique called "packet
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switching": the data to be sent is split in multiple fragments of the same size
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("packets"), and a source address and a destination address is added to each
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packet, in order to allow the routers to find a path in the network towards the
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destination and allow the receiving device to answer the message.
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This packet switching can be seen clearly when you watch a video on the Internet.
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You can see that the video loads in blocks around 5-6 seconds long: those blocks
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are the packets that have reached your device and have been stored in the memory
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of your computer.
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