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Cisco Exam #642-642 QOS Exam (Cisco Press, set 2)
Check your knowledge of Cisco's Quality of Service protocols with these 15 sample exam questions and answers.

courtesy of   Cisco Press

1. Answers B and C are correct.

2. Answers A and C are correct.

3. Answer D is correct.

4. Answers B and D are correct.

5. Answer C is correct.

6. Answer B is correct.

7. Answer C is correct.

8. Answer C is correct.

9. Answer B is correct.

10. Answers B and E are correct.

11. Answer D is correct. The answer is derived by dividing the number of bits in the fragment by the link speed, and converting to milliseconds: 160 bytes x 8 bits/byte / 64,000 bits/second = .02 seconds = 20ms.

12. Answer D is correct.

13. Answer C is correct.

14. Answer A is correct.

15. Answer C is correct.

Questions and answers provided by Cisco Press. To order the full version of this exam simulation, click here.

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