How many collision domains are present in this network?

Refer to the exhibit.

All devices attached to the network are shown.

How many collision domains are present in this network?
A . 2
B . 3
C . 6
D . 9
E . 15

View Answer

Answer: E

Explanation:

A switch uses a separate collision domain for each port so there are a total of 9 for each device shown. In addition to this, the switch to switch connections (3) are a separate collision domain. Finally, we add the switch to router connections (2) and the router to router connection (1) for a total of 15.