無意中發現無線路由器中 wifi TX/RX率都超過100M bit/s，但是電腦實際上10M bit/s都沒有。網上查到兩個解釋：
“The TX/RX rate is the rate that "the radios talk to each other" !
It is NOT the same as the speed of the data (Ethernet throughput) that you have going through the connection.”
“Over the air rate and net throughput are two different things. There is close to 40-50% overhead in wireless transmissions so modulation rate (OTA), expect 50-60% of that. ”
總之，就是無線傳輸還需要另外的開銷，TX/RX率一定大於實際吞吐量。
參考鏈接：https://community.ubnt.com/t5/The-Lounge/What-is-the-TX-RX-Rate/td-p/1586208