Discussion
You have 10 users plugged into a hub running 10Mbps half-duplex. There is a server connected to the switch running 10Mbps half-duplex as well. How much bandwidth does each host have to the server?
Answer: D
Correct answer: 1 Mbps
A hub is a shared medium: every port is in the same collision domain, and the 10 Mbps is divided among everyone using it. With ten users,
\[ \frac{10}{10} = 1 \text{ Mbps each} \]and half duplex means they cannot send and receive at once either. Replacing the hub with a switch would give each host its own collision domain and the full 10 Mbps, which is precisely the difference between the two devices.
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