A switch or router will limit the number of clients in a collision domain, thus limiting what can be in the collision domain.
A layer 1 device will extend a collision domain
by reducing the hosts
a collision domain is a group of devices where traffic from any one of them could collide with traffic from any other member of the same group. some devices help to shrink collision domains, like switches, while other devices can extend the size of a collision domain (like a hub).
A hub contains a single collision domain and a single broadcast domain, regardless of the number of ports on the hub.
A collision domain is an area on the network where two devices may attempt to transmit at the same time. A hub has 1 collision domain overall. A switch has 1 collision domain per interface. The fewer devices in 1 collision domain, the better. ----
AnswerYes. You can't split a broadcast domain without also splitting the collision domain. The only devices that can split a broadcast domain are routers and layer 3 switches. Switches, bridges, and routers can all be used to split the collision domain. Hubs and repeaters do not split the collision domain or the broadcast domain.
Hubs do not reduce collision domains. All devices connected to the hub are in a single collision domain, where as on a switch, each port is its own collision domain.
in my opinion there is no any collision domain in the router......but switch has collision domains for each interfaces & hub has one collision domain
Collision domain
You can't eliminate collision in a broadcasting domain. What you can do is to increase the number of collision domain within a broadcasting domain by using more switches. this will improve your network traffic because the more the collision domain, the better is your network in terms of data transmission performance.
A hub has a single collision domain, which is why it can cause problems when network traffic is high.