How is data transmitted over the wire?

Question

Data transfer

I don't understand the physical process of transferring information over a wire. Let's say I need to transfer 1001101, and how can I do it? From computer science, I know that 1 is current, 0 is no current. So what, how does a computer distinguish 11 and 00 from 1 and 0? This is considered sequentially there is no charge and sequentially it is.

Answer 1

If you are told in a computer science lesson about "there is a current and there is no current", then there is probably little sense in such a lesson.
In fact, nobody does that. The most primitive way to transmit digital data is two voltage levels, above and below. So the receiver "understands" that the communication channel is not interrupted. Next, things like duration come into play - each digit in the signal takes a certain period of time in accordance with the speed set for the channel, or there is an additional clock signal that counts these intervals.