A Router
Hubs are not collision domains but a networking device. Hubs have single collision domain that makes them very undesirable for modern networks.
No
On shared-media networks (i.e. hubs or pure ethernets), routers break up broadcast domains and bridges break up collision domains. Routers also break up collision domains. On switched networks, routers break up broadcast domains, and every switch port is its own separate collision domain.
switches
Yes, routers can break up collision and broadcast domains.
Four collision domains are present Two broadcast domains are present.
Vampire Tap Big collision and broadcast domains, bandwidth problems.
A bridge typically creates separate collision domains within the same broadcast domain. If you take a bridge with 2 ports, each port connects to a LAN segment that is in its own collision domain. Therefore, for a 2 port bridge you will get 2 different collision domains.
Zero. No collisions can occur within a full-duplex environment, as transmit and receive operations are performed on another set of wires. Thus, no collision domains would exist. Carrier Sense Multiple Access with Collision Detection (CSMA/DC) is not part of a full-duplex network for this reason.
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
Since a router does not forward broadcast messages it automatically splits up the broadcast domains for all clients connected to them.
There is no purpose. It is rather unfortunate downside. In early years of networking networks were not capable of full duplex as result admins had to deal with collision domains. Problem of collision domains does not exist in modern equipment because data sent and received on different pairs of wires. There are exceptions but they are not applicable to the most of situations admins have to deal with.