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Cisco CCNA/CCENT Exam 640-802, 640-822, 640-816 Preparation Kit by Dale Liu

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1. Which of the following statements regarding hubs are true?
A. They operate at the data link layer.
B. They increase the number of collisions.
C. Layer 2 addresses are used to make forwarding decisions.
D. Signals are distributed through all ports except the source port.
Correct Answers & Explanations:B, and D. Answer B is correct, because a hub increases collisions on your network. When you use hubs on your network, all of them use shared media. Answer D is correct, because when a hub sends traffic it does this to all ports except the originating port.
Incorrect Answers & Explanations:A, and C. Answer A is incorrect, because a hub works at the physical layer. Answer C is incorrect, because hubs don't work with MAC addresses.
2. Which switching mode ...

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