2/20/2013
Lab #7, CODEC Selection for a WAN
Lab Report In the Results Browser, expand FTP and select Download Response Time (sec). Change the view from AS IS to time_average and select the Show button. Zoom in on the last two-thirds of the graph to eliminate start-up oscillation time and to get better granularity of the results. Copy and label this graph to your lab report. Then use this graph to answer the following questions.
[pic]
( 1. For the G.711 run, estimate the FTP response Time.
[pic]
11 seconds is about the average FTP response time
( 2. For the G.729 run, estimate the FTP response Time.
9.5 seconds is about the average FTP response time.
( 3. For the G.723.1 run, estimate the FTP Response Time.
7.5 seconds is about the average FTP response time.
Close the FTP tree. Expand E-mail and select Download Response Time (sec). Change the view from AS IS to time_average and select the Show button. Zoom in on the last two-thirds of the graph to eliminate start-up oscillation time and to get better granularity of the results. Copy and label this graph to your lab report. Then use this graph to answer the following questions.
[pic]
( 4. For the G.711 run, estimate the E-mail Download Response Time.
2.5 seconds is the average email download response time.
( 5. For the G.729 run, estimate the E-mail Download Response Time.
2.4 seconds is the average email download response time.
( 6. For the G.723.1 run, estimate the E-mail Download Response
[pic]Time.
2.3 seconds is the average email download response time.
Close the E-mail tree. Expand Voice and select Traffic Received (bytes/sec). Change the view from AS IS to time_average and select the Show button. Zoom in on the last two-thirds of the graph to eliminate start-up oscillation time and to get better granularity of the results. Copy and label this graph to