negora
Occasional Visitor
Hello:
This is my first message here, so salutes to you all .
I've a question with regard to the bandwidth of a wireless connection. I've a computer with an ASUS PCE-AC68 card (3x3:3). It's connected to an ASUS RT-AC68U router (3x3:3) using a wireless connection. I've another computer that is connected to the same router, but with an UTP cable.
I've used the "iperf3" application to measure the bandwidth between both computers. Both have Debian 9.3 installed. First, I've measured the download rate in the computer that is connected wirelessly. So I've run "iperf" in server mode in that machine, and I've run the same application, but in client mode, from the other computer. It has resulted ~240 Mbps.
After that, I've measured the upload rate from that same computer. It has resulted to be near the half of the download rate: ~110 Mbps.
I've repeated the tests several times. I've also made similar tests using a laptop with an Intel card (2x2:2) and an ASUS EA-AC87 access point(4x4:4) and the results have been, relatively, identical: always the upload rate was, approximately, the half of the download one.
Connecting both computers with UTP cables to the router I got the same rates for download and upload, so I discard that it has anything to do with the CPU power.
Why does it happen? Has it anything to do with the acknowledgement packages used in TCP? Or with the acknowledgement frames in the 802.11 standards? If that were the case, Don't the packages follow the same route in both cases (downloading and uploading) but in different direction?
Thank you.
This is my first message here, so salutes to you all .
I've a question with regard to the bandwidth of a wireless connection. I've a computer with an ASUS PCE-AC68 card (3x3:3). It's connected to an ASUS RT-AC68U router (3x3:3) using a wireless connection. I've another computer that is connected to the same router, but with an UTP cable.
I've used the "iperf3" application to measure the bandwidth between both computers. Both have Debian 9.3 installed. First, I've measured the download rate in the computer that is connected wirelessly. So I've run "iperf" in server mode in that machine, and I've run the same application, but in client mode, from the other computer. It has resulted ~240 Mbps.
After that, I've measured the upload rate from that same computer. It has resulted to be near the half of the download rate: ~110 Mbps.
I've repeated the tests several times. I've also made similar tests using a laptop with an Intel card (2x2:2) and an ASUS EA-AC87 access point(4x4:4) and the results have been, relatively, identical: always the upload rate was, approximately, the half of the download one.
Connecting both computers with UTP cables to the router I got the same rates for download and upload, so I discard that it has anything to do with the CPU power.
Why does it happen? Has it anything to do with the acknowledgement packages used in TCP? Or with the acknowledgement frames in the 802.11 standards? If that were the case, Don't the packages follow the same route in both cases (downloading and uploading) but in different direction?
Thank you.