作者sssaht ()
看板digitalk
標題有個疑惑
時間Sun Oct 7 15:36:58 2007
這是我修課時看到的
A client-server system uses a satellite network,with the satellite at a
height of 40,000 km.What is the best-case delay in response to a request?
解答寫request has to go up and down,and the response has to go up and down.
所以40000x4=16000km 16000/300000(光速)=533(msec)
我是覺得應該只要request go up to satellite,response 再go down, 應該只走了
40000x2,請問為什麼解答寫那樣呢?
各位高手有什麼見解?大感謝^^
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◆ From: 61.228.25.52
※ 編輯: sssaht 來自: 61.228.25.52 (10/07 15:40)
※ 編輯: sssaht 來自: 61.228.25.52 (10/07 15:40)
1F：推 capitalM:server也在地上啦....衛星只是負責傳訊號而已 10/07 15:58
2F：推 pk:這個要把衛星看成訊號的轉運站 10/08 01:19