Cisco 100-105 Exam

Refer to the exhibit. All devices attached to the network are shown. Which number of collision domains are present in this network?

All devices attached to the network are shown. Which number of collision domains are present in this network?

  • A. 9
  • B. 3
  • C. 6
  • D. 2
  • E. 15
Answer: Option 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.

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