Students at a small community college are streaming YouTube videos constantly wh
ID: 3691880 • Letter: S
Question
Students at a small community college are streaming YouTube videos constantly while using their laptops, smart phones, tablets, etc. The YouTube web site sends compressed video streams consisting of the following:
• 480 by 360 pixel frames
• 24-bit color (each pixel is represented by 24 bits)
• 20 frames per second • Using a 10:1 compression ratio
Assume wireless interfaces can only transfer data at a maximum rate of 54 Mbps, and these devices have around 400 MHz 64-bit buses. The school pays for DSL service at a 1.54 Mbps speed to have access to the Internet.
a) How much of the school’s wireless network capacity (rate) are students consuming when watching YouTube videos?
b) What percentage of available bus cycles on these portable computers is consumed when watching the videos?
c) What if there are 1000 students streaming at the same time on the network?
d) What if the campus Internet connection capacity is increased to a High speed of 45 Mbps?
Does your answer to Question 1 or Question 2 support forbidding students to watch YouTube videos at DSL and High-Speed rates?
Explanation / Answer
a)
11.87Mbps per student
b)
11.87% of internal network bus
d)
one student watching a single video will completly saturate the college bandwidth.So more students cant watch the video's
We should use a T3 line it would allow three simultaneous streams but it cannot be done so in my point of view its not ideal.