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Computer Networks From Scratch

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Our teleprinter works great for sending short messages back and forth. But think about how cumbersome it would be for sending and receiving large documents. Not only is the 80 character wide printer not ideal for long messages, but it’s a mostly synchronous system that requires a person to input every reply one letter at a time. If Alice requests a document from Bob, Bob has to be there sitting at his machine in order to type out the document, letter by letter, to send back to Alice. If we think about it for a bit, we can imagine a much better system that corrects some of the teleprinter’s flaws. Instead of a teleprinter, let’s design a machine that allows Bob or Alice to type out and save documents. Once saved, a document will then be available for the user on the other side of the connection to request at any time. After the request, the document will be delivered to them automatically. We can also add the capability to send files directly to the other user without them requesting it

Computer Networks From Scratch Finally, Something that Looks Like a Computer! Ch. 4 Collaborative computing creates cooperation Our teleprinter works great for sending short messages back and forth. But think about how cumbersome it would be for sending and receiving large documents. Not only is the 80 character wide printer not ideal for long messages, but it’s a mostly synchronous system that requires a person to input every reply one letter at a time. If Alice requests a document from Bob, Bob has to be there sitting at his machine in order to type out the document, letter by letter, to sen

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