Examine Figure 2-15. How many broadcast and collision domains are there?
There are 14 collision domains. Each port on a bridge, router, and switch define a new broadcast domain. You cannot easily tell how many broadcast domains exist in the network due to the presence of the switch. A switch can create one or many broadcast domains, depending upon how you configure it. If the switch is configured as one broadcast domain, there are two broadcast domains. This is not a recommended solution, because both sides of the router attached to the switch and bridge belong to the same broadcast domain. This is not good. On the other hand, the switch can have many broadcast domains defined.