Answer to Question #171254 in Computer Networks for samuel

Question

Consider a bit streaming scenario for a video where the following values apply: – The buffer size is 1 MiB – The low watermark is set at 100KiB – The high watermark is set at 900KiB – The incoming data rate is 1Mbps – The video display rate is 300 Kbps

 Assume that the video is playing and that the buffer content has dropped to the low-water mark. The media player sets the controls for data input to begin again

Answer 1

Data which to be streamed:

(high watermark)-(low watermark)$=900-100=800\ kb$

Let $x$ be the time after the streaming begins. Then:

(buffer size)$x-$(video display rate)$x=$ (Data which to be streamed)

$1000x-300x=800$

$x=8/7\ s$

So, it will take $8/7$ second to fill up to the high water mark.