有次發現, CHROME下載時會只有200~300KB/s的下載速度, 就算是在GOOGLE DRIVE下載, 也沒有改變。 最後, 原來問題在於CHROME內的Quic Protocol的默認通信本身, 使下載得1成速度。不過更重要的是, 問題出於與Sophos UTM9防火牆之間的關。 最後測試得到以下解決方法: 1) chrome://flags 2) 把"Experimental QUIC protocol"設為DISABLE 這樣就能回復正常下載速度。 One day, I found Chrome's download speed just has 200~300KB/s. Even I download a file from Google Drive, the speed can't increase. After searching, I have a result. This problem comes from Chrome and Sophos UTM9 firewall. If it needs to get back the speed, you need to disable the QUIC Protocol from Chrome. Following are the steps: 1) Type chrome://flags 2) Find "Experimental QUIC protocol" and disable it.