2.1-application-http

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Which equation is used to calculate the access link utilization?

access link utilization = 0.9/1.54
access link utilization = . utilization, delay
access link utilization = 0.6 * 1.50 Mbps (correct)
access link utilization = 0.6 (2.01) + 0.4 (~msecs)

What is the value of the access link utilization when the cache hit rate is 0.4?

0.6
0.9
1.54
0.58 (correct)

What is the average end-to-end delay when 40% of requests are served by the cache?

0.6
1.2 (correct)
2.01
0.4

What is the rate at which requests are satisfied at the origin servers over the access link when the cache hit rate is 0.4?

0.6 * 1.50 Mbps (B) Signup and view all the answers

What is the value of the access link utilization when the cache hit rate is 0.6?

0.6 (C) Signup and view all the answers

What is the average end-to-end delay when 60% of requests are served by the cache?

1.2 (C) Signup and view all the answers

What is the rate at which requests are satisfied at the origin servers over the access link when the cache hit rate is 0.6?

0.6 * 1.50 Mbps (A) Signup and view all the answers

What is the average end-to-end delay when the cache hit rate is 0.2?

0.4 (A) Signup and view all the answers

What is the rate at which requests are satisfied at the origin servers over the access link when the cache hit rate is 0.2?

0.9/1.54 (C) Signup and view all the answers

What is the value of the access link utilization when the cache hit rate is 0.2?

0.58 (A) Signup and view all the answers

How do you calculate the access link utilization?

The access link utilization can be calculated by dividing the rate at which requests are satisfied at the origin servers over the access link by the link capacity. In this case, the formula is $\text{access link utilization} = \frac{0.6 \times 1.50 , \text{Mbps}}{1.54 , \text{Mbps}}$. Signup and view all the answers

What is the value of the access link utilization when the cache hit rate is 0.4?

The value of the access link utilization when the cache hit rate is 0.4 is 0.58. This is calculated using the formula $\text{access link utilization} = \frac{0.6 \times 1.50 , \text{Mbps}}{1.54 , \text{Mbps}}$. Signup and view all the answers

What is the average end-to-end delay when 40% of requests are served by the cache?

The average end-to-end delay when 40% of requests are served by the cache is approximately 1.2 seconds. This is calculated using the formula $\text{average end-to-end delay} = 0.6 \times (\text{delay from origin servers}) + 0.4 \times (\text{delay when satisfied at cache})$. Signup and view all the answers

What is the rate at which requests are satisfied at the origin servers over the access link when the cache hit rate is 0.6?

The rate at which requests are satisfied at the origin servers over the access link when the cache hit rate is 0.6 is 0.9 Mbps. This is calculated using the formula $\text{rate to browsers over access link} = 0.6 \times 1.50 , \text{Mbps}$. Signup and view all the answers

What is the average end-to-end delay when 60% of requests are served by the cache?

The average end-to-end delay when 60% of requests are served by the cache is approximately 1.2 seconds. This is calculated using the formula $\text{average end-to-end delay} = 0.6 \times (\text{delay from origin servers}) + 0.4 \times (\text{delay when satisfied at cache})$. Signup and view all the answers

2.1-application-http

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Questions and Answers

Which equation is used to calculate the access link utilization?

What is the value of the access link utilization when the cache hit rate is 0.4?

What is the average end-to-end delay when 40% of requests are served by the cache?

What is the rate at which requests are satisfied at the origin servers over the access link when the cache hit rate is 0.4?

What is the value of the access link utilization when the cache hit rate is 0.6?

What is the average end-to-end delay when 60% of requests are served by the cache?

What is the rate at which requests are satisfied at the origin servers over the access link when the cache hit rate is 0.6?

What is the average end-to-end delay when the cache hit rate is 0.2?

What is the rate at which requests are satisfied at the origin servers over the access link when the cache hit rate is 0.2?

What is the value of the access link utilization when the cache hit rate is 0.2?

How do you calculate the access link utilization?

What is the value of the access link utilization when the cache hit rate is 0.4?

What is the average end-to-end delay when 40% of requests are served by the cache?

What is the rate at which requests are satisfied at the origin servers over the access link when the cache hit rate is 0.6?

What is the average end-to-end delay when 60% of requests are served by the cache?

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