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With hubs, we've one big collision domain consisting of all connected hosts. When hosts are connected to their own switch ports, they each have their own individual collision domain.
Hubs only allow one device to transmit at a time, resulting in shared bandwidth. Switches allow hosts to transmit simultaneiously.
When one host connected to a hub sends a bradcast, every other host receives that bradcast and there's nothing we can do about it. When a host connected to a switch sends a broadcast, every other host receives it by default - but there is something we can do about that, as you'll see in the VLAN section of this course.
The universal symbol for switch is a box with four arrows in opposite directions. When systems are connected to switch just as shown in the following network diagram each of the system has its own collision domain. So the collision can not occur.
Switches does not break up in broadcast domain. All the systems are in a single broadcast domain. This is by default setting and can be configured in the switch.
Microsegmentation is a term sometimes used in Cisco documentation to describe the "one host, on collision domain" effect of that last bullet point. It's not a term I hear a great deal in the field, and you might not either, but it's a good term to know for Cisco exams.
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With hubs, we've one big collision domain consisting of all connected hosts. When hosts are connected to their own switch ports, they each have their own individual collision domain.
Hubs only allow one device to transmit at a time, resulting in shared bandwidth. Switches allow hosts to transmit simultaneiously.
When one host connected to a hub sends a bradcast, every other host receives that bradcast and there's nothing we can do about it. When a host connected to a switch sends a broadcast, every other host receives it by default - but there is something we can do about that, as you'll see in the VLAN section of this course.
The universal symbol for switch is a box with four arrows in opposite directions. When systems are connected to switch just as shown in the following network diagram each of the system has its own collision domain. So the collision can not occur. 
Switches does not break up in broadcast domain. All the systems are in a single broadcast domain. This is by default setting and can be configured in the switch.
Microsegmentation is a term sometimes used in Cisco documentation to describe the "one host, on collision domain" effect of that last bullet point. It's not a term I hear a great deal in the field, and you might not either, but it's a good term to know for Cisco exams.
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