What is the difference between a Broadcast domain and a collision domain?

Question

Computer networks

I know and read what a collision domain and a broadcast domain are, please explain to me what is the essence of the difference between a broadcast and a collision domain, for example, why is a switch port called a collision domain? why, and the switch that supports the vlan is called a broadcast domain?

Answer 1

Broadcast (or better in Russian: broadcast) domain at the L3 level (although L2 is also for ARP requests).
The collision domain is at the L1 level, and it has lost its relevance since the hubs were supplanted by switches.

Answer 2

I never used it for an experiment - they don’t give)))
As I understand it.
What prevents you from making 2 networks 192.168.1.1/255.255.255.0 and 192.168.0.1/255.255.0.0 on the Vlan switch. Take a look at the netmask. There is an intersection. BUT one network belongs to one domain, and another to another.
If you try it easier, you have domains, but they belong to the same link layer (PPP, IEEE 802.22, Ethernet, DSL, ARP), they are on the same network and there is no definite answer to the question of which domain the IP belongs to.
Broadcast is more interesting, on Vlans you can limit the signal, those on each Vlan make their own DHCP (they don’t let me do it - I can bring down the network)))). Broadcast will not go where it is not necessary (should not).
On Vlans, you can divide the network at the second level of the network model (roughly).

Answer 3

Actually from the names everything is clear.
Broadcast, a type of traffic that is transmitted unconditionally to all recipients, in a specific environment.
Collisions are an effect when several sources transmit data to the same medium (for example, a wire that is used as a bus, a hub), and packets are corrupted.
For example, if three devices are connected through a hub and generate broadcast traffic, then this will be one collision and broadcast domain. Because the hub is a repeater, and packets "may collide with each other", and one broadcast domain, because packets formed by the source as broadcast packets will be received by all devices.
And if we change the scheme. Instead of a hub, we will put a switch. Then there will be different domains. Packets will also be delivered to everyone, but they will not collide (create collisions).