1 votes 1 votes A 1 Mbps satellite link connects two ground stations. The altitude of the satellite is 6000 km and speed of the signal is 3 × 10^8 m/s. What should be the packet size for a channel utilization of 50% for a satellite link using go-back-63 sliding window protocol? Assume that the acknowledgment packets are negligible in size and that there are no errors during communication. 81031 Bytes 83101 Bytes 801301 Bytes 81301 Bytes Computer Networks sliding-window computer-networks made-easy-test-series + – Badayayash asked Jan 28, 2019 • recategorized Mar 3, 2019 by ajaysoni1924 Badayayash 849 views answer comment Share Follow See all 8 Comments See all 8 8 Comments reply Gupta731 commented Jan 28, 2019 reply Follow Share They have provided the wrong solution. Answer must be 320 bits 0 votes 0 votes Badayayash commented Jan 28, 2019 reply Follow Share no they are actually correct we have to consider distance from a to satellite and from satellite to b then tp = 40msec and when we put efficiency as 1/2 1/2 = 62 / (1 + (2*40*10^3)/L) after solving L = 650.40 bits therefore L = 81.3 Bytes correct me if wrong but in there answers they have multiplied it by 100 dont know why !! 1 votes 1 votes Gupta731 commented Jan 28, 2019 reply Follow Share almost similar question https://gateoverflow.in/3375/gate2008-it-64 with proper explanation 0 votes 0 votes balchandar reddy san commented Jan 28, 2019 reply Follow Share 1/2 = 62 / (1 + (2*40*10^3)/L) -> 1/2 = 63 / (1 + (2*40*10^3)/L) 63 is the sender window size,which should be used in the formulae right? 1 votes 1 votes Badayayash commented Jan 28, 2019 reply Follow Share they also did the same thing good explanation there 0 votes 0 votes Gupta731 commented Jan 28, 2019 reply Follow Share Dont trust made easy answers. 0 votes 0 votes Badayayash commented Jan 28, 2019 reply Follow Share @balchandar reddy san yea then ans becomes 79.68 thank you for pointing it out actually in made easy they took 62 that's why i mistakenly used 62 0 votes 0 votes ronak.ladhar commented May 12, 2020 reply Follow Share It is actually whole 80 not 79.68. 0 votes 0 votes Please log in or register to add a comment.