# Read carefully and give detailed answers.

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Be sure to cite your sources, use APA style as required, check your spelling.

Test Your Understanding:

Question

a) What are QoS metrics? (Do not just spell the acronym.)

b) Why are QoS metrics important?

Question

a) Distinguish between rated speed and throughput.

b) Distinguish between individual and aggregate throughput.

c) You are working at an access point with 20 older people. Three are doing a download at the same time you are. The rest are looking at their screens or sipping coffee. The access point you share has a rated speed of 150 Mbps and provides a throughput of 100 Mbps. How much speed can you expect on average for a download? (Answer 25mbps)

d) In a coffee shop, there are 10 people sharing an access point with a rated speed of 2 Gbps. The throughput is half the rated speed. Several people are downloading. Each is getting an average of 100 Mbps. How many people are using the Internet at that moment?

Question

a) Distinguish between dedicated and multiplexed transmission links.

b) If 100 conversations averaging 50 Mbps are multiplexed on a transmission line, will the required transmission line capacity be less than 5 Gbps, equal to 5 Gbps, or more than Gbps?

c) What is the business benefit of multiplexing?

Thought Questions 3-1 and 3-3

3:1 Your home is connected to the internet. You get to create SLAs that the ISP must follow. Being reasonable, write SLAs you would like to have for the following things.

a) Write an SLA for speed.

b) Write an SLA for availability

c) Write an SLA for latency. Do no just say what each SLA should include. Actually, write the SLAs as the ISP would write them in the form of specific guarantees. Failure to do this will result in a substantial grading penalty.

3:3 Figure 3-27 uploaded below shows four sites communicating. Each site needs to communicate with each other site at 2 Mbps, except for Paris. Paris needs to communicate with each other site at 5 Gbps. Create a traffic table and solve it. (Partial Answer for London-Munich, the total traffic is 5,004 Gbps.)

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