[問答] hub & switch

看板Network作者pop10353 (女乃豆頁單戈示申)時間11年前 (2013/07/28 17:21)推噓3(3推 0噓 3→)

留言6則, 3人參與討論串1/1

Suppose there are five computers connected together to form a LAN. The maximum data transport rate that the network cable can provide is 100Mbps, ideally. If we use a hub to connect them,all computers in the network share the 100Mbps bandwidth. <<這句話是說所有電腦會分享總寬頻？那麼分享的意思是共用、還是分割？ If we use a switch,then any two of the computers can communicate with each other without disturbing the other computers. Assume that the other four computers only communicate with each other, and each has a constant data rate of 20Mbps.<<想問這句話確切的意思?? Now,you want to download a 10MB file from a remote server,which is located outside your local network. Q1:How long will it take if using a hub? Q2:How long will it take if using a switch? Ans:1. (10*8)/ (100-20*4)= 4sec 2. (10*8)/ 100=0.8sec -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 124.9.193.233

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imiss0960

07/28 19:00, , 1^F

07/28 19:00, 1^F

如果是共用那為什麼第一個問題100Mbps要扣掉80?? ※ 編輯: pop10353 來自: 124.9.193.233 (07/28 20:09)

推

badctc252

07/29 20:47, , 2^F

07/29 20:47, 2^F

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badctc252

07/29 20:48, , 3^F