How does a packet travel from one computer to another over the Internet based on OSI model

Question

I am familiar with the basic OSI model but I always get confused how does a packet travel from one machine to another over the Internet and what OSI layers do come into picture?

Answer 1

The only thing that can travel over a copper wire are pulses of electricity. The binary number 1 is represented by a pulse of electricity or no pulse of electricity for 0. Just keep in mind that real data of any kind cannot be sent over copper wire, fibre optic, or through the air ...only a representation of the data which has previously been converted to a 1 or a 0 and then is reconverted back at the receiving end.