Collision Domain

Hello Moshe

That’s an interesting question you bring up. Keep in mind that a collision domain is not defined by whether or not collisions actually occur. A collision domain is a segment of a network that is bordered by either a port on a router, or a port on a switch. Now if you happen to have a single host connected to a port on a switch, and it is in full duplex mode, collisions won’t occur, but the definition of the collision domain still stands.

This is because, if you connect a hub to that switch port, and connect multiple hosts to that hub as shown below, you are taking that same collision domain, and expanding it. Now it has has more hosts, and collisions can occur.

I hope this has been helpful!

Laz

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