If three devices are plugged into one port on a switch and two devices are plugged into a different port, how many collision domains are on the switch?
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A. B. C. D.A
The concept of collision domain comes from the Ethernet networking technology, where a collision domain refers to a segment of a network where packets can collide with each other due to sharing the same physical medium. In a switched network, each port on the switch represents a separate collision domain.
In the given scenario, three devices are plugged into one port on a switch, and two devices are plugged into a different port. To determine the number of collision domains on the switch, we need to count the number of ports that have devices connected to them.
Therefore, the switch has a total of two collision domains, one for each port with connected devices.
Hence, the correct answer is A. 2.