I've been having a problem with the theory that full-duplex NICs are supposed to operate at the same maximum rate for both upstream and downstream, but in reality, does the maximum rate of the card's logo refer to the sum of the upstream and downstream rates or is it the same as the upstream and downstream rates.
In order to solve this problem, so took two desktops, respectively, equipped with a gigabit network card (full-duplex), and the use of Category 6 cable network cable, the two hosts at the same time to each other to copy files, the effect is as follows:
Conclusion:
Full-duplex NIC, its upstream and downstream rate is the same and equal to the maximum rate of the card's work, not that the sum of the upstream and downstream rate is equal to the rate of the card. As you can see, the last two charts, two hosts at the same time remote copy files, upstream and downstream rate are 111MB/s, that is to say, in this experiment in the same moment of the Gigabit NIC upstream and downstream rate of 111 * 8Mb / s, that is, 888Mb / s, it can be said that the rate of this card upstream and downstream at the same time under the same moment to reach the rate of the Gigabit.