With cable length and speed

Hello, All the passage of the signal, which is assumed to be equal to the speed of light, this is due. A standing wave appears (or rather does not go out but is reflected) if the wire outputs not compensated by active resistance equal to characteristic impedance wires (and characteristic impedance is related to inductance and capacitance wires). Precisely because (maybe anyone remembers? ;)) on coxel from computers, wave the resistance of which is 50 ohms, caps were hung at the ends (also 50 ohms) om;)). That is why the limit for 10MBit Ethernet is 2.5 km of wire - to reliably detect interference and reflected waves. And the meaning is this - a croak can be so that such a short wire forms such big interference - after all, there is no electric welding nearby, and there are no powerful energy consumers (read: jammers). This is why I ask - if anyone has the opportunity, write down the timing diagram.