The difference between analogue and digital in signalling is that with digital, if the signal integrity through a cable reaches a certain threshold, then you achieve perfect transmission of whatever protocol you are sending. Where this threshold is depends on how much bandwidth the protocol uses.
This does not mean that all digital cables are fine then - with very long, low quality and/or improperly terminated network cables, you tend to see higher packet loss, sometimes you see dropouts, and sometimes the equipment negotiates to a lower speed. This kind of thing has a lot to do with what's happening in the analogue domain, because interference and signal integrity problems interferes with decoding the analogue signal back into the digital data, so you have packets that fail the checksum validation because they have been corrupted mid-flight.
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The difference between analogue and digital in signalling is that with digital, if the signal integrity through a cable reaches a certain threshold, then you achieve perfect transmission of whatever protocol you are sending. Where this threshold is depends on how much bandwidth the protocol uses.
This does not mean that all digital cables are fine then - with very long, low quality and/or improperly terminated network cables, you tend to see higher packet loss, sometimes you see dropouts, and sometimes the equipment negotiates to a lower speed. This kind of thing has a lot to do with what's happening in the analogue domain, because interference and signal integrity problems interferes with decoding the analogue signal back into the digital data, so you have packets that fail the checksum validation because they have been corrupted mid-flight.