A Network Segment Where Only One Device Can Communicate At A Time?

A Network Segment Where Only One Device Can Communicate At A Time ?

The collision domain is the one where only one device can be communicated at a time. Let us know what actually the collision domain is? The collision domain b a group pr the collection of the devices in which the frames of the devices would collide with the frames of the other devices which are present in the same group. Let us take an example, to understand the concept of the collision domains. Let say we have two computers PC1 and PC2, if a frame is created by one of the PC that would collide with the frame that is created by the other PC. Then these two PCs are considered to be in the same collision domain. Now, let us learn how each of the types of routers will define the collision domain. Every Interface on a hub is in the same collision domain, so the computers connected to it will also be in the same collision domain. If a computer sources a frame it is going to hit the shared bus and this hub simply repeats out every connected port. So the collision may occur with these connected devices. If we add the new hub to the same network. Then it is said to be in the same collision domain.

Now let us see how the bridges create and define the collision domains, In a local area network, we will have a bridge at the center, and connected to it will be the two hubs and a single bridge at the center. The functionality of the bridges will be different from the hubs. As we discussed earlier, the hub will just repeat the frame out of any connected interface, here the bridge will be a little smarter. In the bridge, when the frame comes in it will take a look at the destination address of that frame and it will compare it with the list of the addresses it knows, and when we find it says that it knows the interface that needs to send the frame out to reach its final destination address. It sends only in that particular interface, it doesn’t repeat out in every connected interface. The bridges will be present at layer 2 of the OSI model and the hub will be at layer 1 of the OSI model. The bridges can create multiple collision domains so every interface connected to a bridge will have a separate collision domain.

Now let us know how the switches get performed. In the local area network, we will be having a switch in the network and four PCs are connected to this switch. These switches are similar to the bridges, but these have a lot more bridges and a lot more robust we can do with them. The switch will also create multiple collision domains and every device connected to this switch will be having a separate collision domain. Every Interface of this switch will be having a separate collision domain.

The routers will act as the switches when it comes to the collision domain, it creates multiple collision domains and will have a separate collision domain.