GATE | GATE IT 2006 | Question 68
On a wireless link, the probability of packet error is 0.2. A stop-and-wait protocol is used to transfer data across the link. The channel condition is assumed to be independent from transmission to transmission. What is the average number of transmission attempts required to transfer 100 packets?
(A) 100
(B) 125
(C) 150
(D) 200
Answer: (B)
Explanation: Probability of success = 0.8
E = 0.8 * 1 + 0.8 * 1 +… n times = 100 {for 100 packets}
=> 0.8 * 1 * n = 100
=> n = 125
to receive 100 packets we have to transmit 125 packets
Quiz of this Question
Please comment below if you find anything wrong in the above post
Last Updated :
28 Jun, 2021
Like Article
Save Article
Share your thoughts in the comments
Please Login to comment...