Postbox

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Postman collects mail
Distribution house
Postbox
Mail arrives at sorting house
Mail delivery
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24 hour connection to the network of other
servers (the internet)
Senders server (e.g. Freeserve, AOL)
Senders computer
Receiver logs in and gets mail from their server
(e.g. Freeserve, AOL)
Receiver's server (could be anywhere in the
world)