Your company is transmitting 500- character ( byte) records at a rate of 400,000

Question

Your company is transmitting 500- character ( byte) records at a rate of 400,000 bits per second. You have been asked to determine the most efficient way to transmit these records. If a Stop- and- wait error control system is used, how long will it take to transmit 1000 records? If a sliding window error control is used with a window size of 127, how long will it take to transmit 1000 records? If, on the average, one record in every 200 records is garbled, how long will it take to transmit 1000 records? What are your conclusions?

Your writeup should be no more less than 200 words. All citation and references should be using APA style.

Explanation / Answer

Solution:

The rate of transfer= 400000

Size which is being transmitted= 500 bytes= 500*8 = 4000 bits

Records transmitted per second = 400000/4000 = 100 records/second

Stop and wait:

time taken to transmit 100 records = 2*transmission time of 100 = 2 seconds

for 1000 it will take = 1000/10 *2 = 20 seconds

Sliding window:

1000 records transmission time= 10 sconds

window size is 127 bits

Time= 10/127 = 78.74 msec

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