0 0 votes answer given is 11. I am Getting 3 Computer Networks go-back-n + – amitqy 563 views answer comment Share Follow Print See 1 comment 1 1 comment reply eyeamgj commented Nov 16, 2018 reply Follow flag total 21 packets we will send so extra will be 21-10=11 is correct . 0 0 replyShare Please log in or register to add a comment.