[問題] 電腦網路 Go back N相關
看完原文書有部分不懂的地方,
問題一
在 GBN protocol時會因為太久沒收到ACK就time out
但課本總是沒寫到這部分的時間該如何決定
是和transmission time 有關還是propagation time 有關?還是還有其他時間與他相關?
問題二
Sn>=ACK>Sf
例如window size 為3
0(123)0123,括弧部分是window
此時的sn=0,sf=1
這樣的話有效ACK應是2、3、0
但如果ACK=2就不符合那個等式會大於Sn
是不是這時候判斷的Sn應該算是4呢?
以上兩個問題希望有神人們幫忙解答謝謝
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 220.132.70.41
※ 文章網址: https://www.ptt.cc/bbs/Examination/M.1460830007.A.682.html
→
04/17 21:51, , 1F
04/17 21:51, 1F
→
04/17 21:52, , 2F
04/17 21:52, 2F
→
04/17 21:53, , 3F
04/17 21:53, 3F
→
04/17 22:28, , 4F
04/17 22:28, 4F
→
04/17 22:28, , 5F
04/17 22:28, 5F
→
04/17 22:28, , 6F
04/17 22:28, 6F
→
04/17 22:28, , 7F
04/17 22:28, 7F
→
04/17 23:25, , 8F
04/17 23:25, 8F
→
04/17 23:26, , 9F
04/17 23:26, 9F
→
04/17 23:28, , 10F
04/17 23:28, 10F
→
04/17 23:30, , 11F
04/17 23:30, 11F
→
04/17 23:30, , 12F
04/17 23:30, 12F
→
04/17 23:36, , 13F
04/17 23:36, 13F
→
04/17 23:45, , 14F
04/17 23:45, 14F
推
04/18 00:11, , 15F
04/18 00:11, 15F
→
04/18 00:11, , 16F
04/18 00:11, 16F
→
04/18 00:11, , 17F
04/18 00:11, 17F
→
04/18 00:11, , 18F
04/18 00:11, 18F
推
04/18 00:29, , 19F
04/18 00:29, 19F
→
04/18 00:29, , 20F
04/18 00:29, 20F
→
04/18 00:29, , 21F
04/18 00:29, 21F
→
04/18 00:41, , 22F
04/18 00:41, 22F
→
04/18 00:41, , 23F
04/18 00:41, 23F