2 votes 2 votes A computer uses the following sequence numbers:0,1,2,3,4,5,6,7,0,1,2,3,... What will be sender's and receiver's window size that are not possible in SR protocol? a )4,4 b)5,3 c)7,1 d)5,4 komal07 asked Dec 30, 2015 komal07 2.4k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
3 votes 3 votes D. 5,4 Since in SR, Ws+Wr = Sequence number Here sequence number is 0 to 7 = 8 and 5+4=9 thus 5,4 is wrong. C. option is also wrong, Wr, Ws both should not be 1 in SR, as Ws=7 here, it will become Go Back N. Shashank Chavan answered Dec 30, 2015 • edited Jan 10, 2016 by Shashank Chavan Shashank Chavan comment Share Follow See all 7 Comments See all 7 7 Comments reply Himanshu1 commented Jan 10, 2016 reply Follow Share c possible ? 0 votes 0 votes Shashank Chavan commented Jan 10, 2016 reply Follow Share Yeah I missed that.. Wr=1 is not allowed in SR, as Ws=7 it will become Go Back N here! C is also false then. 0 votes 0 votes Himanshu1 commented Jan 10, 2016 reply Follow Share b possible ? 0 votes 0 votes Shashank Chavan commented Jan 10, 2016 reply Follow Share Nope,Ws and Wr are not equal to 1 and Ws+Wr=Available sequence number for SR 0 votes 0 votes Arjun commented Jan 10, 2016 reply Follow Share why can't it go to Go-Back-N? There is no such restriction. https://gateoverflow.in/3725/gate2004-it_81 0 votes 0 votes Himanshu1 commented Jan 10, 2016 reply Follow Share Sir, in Selective Repeat , is it necessary to have Ws = Wr ? 0 votes 0 votes Shashank Chavan commented Jan 10, 2016 reply Follow Share If Wr=1 SR will not accept out of order. And SR should accept out of order packets. 0 votes 0 votes Please log in or register to add a comment.
