[商管] [計概]-中山95-資管
題目連結在此
http://www.lib.nsysu.edu.tw/exam/master/mana/infom/95.pdf
問答題第5題
[15 points] To find out how much slow start limits throughput on an 4Mbps
Ethernet connection(MTU = 10Kbits), we assume that a round-trip delay of 4
milliseconds and packets are send in MTU. Calculate the throughput of the
first 32 packets sent by using (A)[5 points] without slow start(B)[10 points]
slow start.
解答上是寫
傳遞 32 packets 所需要的頻寬是32*10Kbit = 320Kbits < 4Mbps, 所以32個 packets
可以一次送出, 並在一個RTT後得到所有ACK, 因此throughput = 32 packets / 4ms =
8000 packets/second.
想請問為什麼32 packets可以一次送出
網路卡傳到網路線的時間不用計算在內嗎?
我的想法是320Kbits / 4Mbps = 80 ms
throughput = 32 packets / (80 + 4)ms = 381 packets / second.
不過感覺數據差很多 小弟才疏學淺希望各位能幫我解答
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