電腦網路問題 - 考試
By Xanthe
at 2015-06-15T13:38
at 2015-06-15T13:38
Table of Contents
各位大大們好 小的有一題問題想要問
TCP 是網路傳輸層最常用的通訊協定,擁塞控制(congestion control)為其最大特
性。假設某一傳輸連線(session)其最大的擁塞窗口(congestion window)為 24KB
,最大區段(segment)長度為 1KB。請回答以下關於 TCP 擁塞控制的問題:
壜若傳送者現在的擁塞窗口為 18KB,且接受端可接受的公告窗口(advertised
window)為 8KB,並發生傳輸逾時,請問在連續成功傳送五次後,第六次傳送時
,其擁塞窗口為多少?(6 分)
先打出 老師講義的解法:
最初壅塞視窗為 18KB
第一次 >> 發送 8KB 雍塞視窗18KB
第二次 >> 發送 8KB 雍塞視窗18KB
第三次 >> 發送 8KB 雍塞視窗19KB
第四次 >> 發送 8KB 雍塞視窗19KB
第五次 >> 發送 8KB 雍塞視窗20KB
我的想法 :
題目說 雍塞窗口cwnd=18KB 接收端視窗RWS=8KB 傳送端窗口sws 取兩者最小 8KB
然而傳送發生Time out 門檻=9KB cwnd=1KB RWS=8KB 取兩者最小sws=1KB
第一次 cwnd=1 送1KB
第二次 cwnd=2 送2KB
第三次 cwnd=4 送4KB
第四次 cwnd=8 送8KB
第五次 cwnd=9 送8KB 因為cwnd > rws 故 sws = rws
第六次 cwnd=10 送8KB
所以我答 10KB 請問我流程有哪裡錯嗎
我看不太懂老師解法
而且題目不是問第六次傳送後 老師好像少打一次@@?
謝謝
--
Tags:
考試
All Comments
By Kristin
at 2015-06-18T11:22
at 2015-06-18T11:22
By Hamiltion
at 2015-06-23T05:26
at 2015-06-23T05:26
By Christine
at 2015-06-23T13:08
at 2015-06-23T13:08
By Andrew
at 2015-06-24T14:21
at 2015-06-24T14:21
By George
at 2015-06-24T19:49
at 2015-06-24T19:49
By Madame
at 2015-06-29T01:31
at 2015-06-29T01:31
By Noah
at 2015-07-02T20:21
at 2015-07-02T20:21
By Poppy
at 2015-07-06T01:35
at 2015-07-06T01:35
By Frederica
at 2015-07-07T18:03
at 2015-07-07T18:03
By Charlotte
at 2015-07-09T00:59
at 2015-07-09T00:59
By Gilbert
at 2015-07-12T23:44
at 2015-07-12T23:44
By Ida
at 2015-07-15T06:55
at 2015-07-15T06:55
By Blanche
at 2015-07-18T12:50
at 2015-07-18T12:50
By Kyle
at 2015-07-22T05:13
at 2015-07-22T05:13
By Emma
at 2015-07-22T08:38
at 2015-07-22T08:38
By Blanche
at 2015-07-25T03:00
at 2015-07-25T03:00
By Joseph
at 2015-07-29T22:49
at 2015-07-29T22:49
By Elizabeth
at 2015-08-03T22:16
at 2015-08-03T22:16
By Poppy
at 2015-08-06T08:21
at 2015-08-06T08:21
By Zora
at 2015-08-10T00:33
at 2015-08-10T00:33
By Agnes
at 2015-08-13T04:36
at 2015-08-13T04:36
By Agnes
at 2015-08-16T06:39
at 2015-08-16T06:39
By Ivy
at 2015-08-20T00:00
at 2015-08-20T00:00
By Dora
at 2015-08-24T05:00
at 2015-08-24T05:00
By Hedwig
at 2015-08-26T14:09
at 2015-08-26T14:09
By Frederica
at 2015-08-29T03:22
at 2015-08-29T03:22
By Heather
at 2015-08-29T22:49
at 2015-08-29T22:49
By Regina
at 2015-08-30T14:09
at 2015-08-30T14:09
By Hamiltion
at 2015-09-01T04:27
at 2015-09-01T04:27
By Hazel
at 2015-09-03T08:54
at 2015-09-03T08:54
By Isabella
at 2015-09-06T23:57
at 2015-09-06T23:57
By Isabella
at 2015-09-07T06:36
at 2015-09-07T06:36
By Enid
at 2015-09-09T03:01
at 2015-09-09T03:01
By Skylar Davis
at 2015-09-10T06:04
at 2015-09-10T06:04
By Rachel
at 2015-09-12T18:00
at 2015-09-12T18:00
By Margaret
at 2015-09-15T08:24
at 2015-09-15T08:24
Related Posts
campbell 10e testbank
By Gary
at 2015-06-15T11:55
at 2015-06-15T11:55
中國面試名單出爐
By Gary
at 2015-06-15T08:04
at 2015-06-15T08:04
有人試過念到天亮去考試嗎
By Skylar DavisLinda
at 2015-06-15T03:58
at 2015-06-15T03:58
103年高考公職護理師上榜心得(書已贈出) (fwd)
By Caitlin
at 2015-06-15T00:44
at 2015-06-15T00:44
幫忙統計慈濟申訴題目
By Michael
at 2015-06-15T00:41
at 2015-06-15T00:41