How to check the number of collisions in a network?

Question

Computer networks

Is there a "normal" number of collisions per unit of time for a network? What tools are used to measure it?

Answer 1

Collisions arose mainly in topologies such as bus, ring.
In the star topology, when using switches, there should be no collisions.
On the air (wifi / radio ethernet) can be.
Statistics can be viewed on routers or on the interfaces themselves. But on a regular network card, it will most likely be zero.

Answer 2

With the advent of switches, the number of collisions in a wired network tends to zero. But in Wi-Fi collisions can occur