Collision and non-collision networks, what is the point?

Question

Computer networks

Where can I find more detailed information about collision networks. Maybe some articles or tutorials. I hope for your help, thanks.
PS: The networks are very weak.

Answer 1

Simply put, a collision is a superposition of a transmission from two sources. For example, in coaxial Ethernet networks, where all computers were connected to a common bus, a situation could arise when two network cards started transmission almost simultaneously. As a result, a collision occurred, the cards stopped the transmission, waited for a random time and made a new attempt.
In modern twisted-pair networks and switches, this situation is impossible; the computer-switch connection operates in point-to-point mode and uses separate pairs of wires for each direction.
Collision network - WiFi, it is quite possible simultaneous transmission from two sources on the same channel.
Collision-free - PON, here different wavelengths are used for transmission from a node to subscribers and back, and a transmission schedule from subscribers, in which they cannot send packets at the same time.