TP-Link Archer C9 AC1900 Wireless Dual Band Gigabit Router Review

WLAN 2.4GHz 802.11n Performance


The 2.4GHz band is the older of the two wireless bands that are in use today. On this band we find 802.11b/g/n wireless standards with up to 600Mbps bandwidth on offer when using wireless-n compliant devices. Due to the lower operating frequency, 2.4GHz signals offer a wider level of coverage, but the lower throughput speeds are a disadvantage to this ageing band.

Fixed Block Size

To test the maximum throughput speed that a wireless connection can handle, a fixed block size of 16384 Bytes is sent from the client to the server over a period of five minutes. The higher block size will allow the transfer rate to stay as high as possible – in the same way that large files transfer from one drive to another quicker than lots of small files of the same total size.

Variable Packet Size

In a real world situation, the blocks of data that pass through a wireless adaptor are not of the same size each time, so to give a more realistic impression of how an adaptor performs, the adaptor is once again tested at each range for a period of five minutes. This time however, the block size will vary from 32 Bytes up to 16384 Bytes in increasing steps of 148.7 Bytes each time.

The 2.4GHz band showed the best performance on the long-range where the beam forming technology allowed the signal to get the best coverage. A little surprising result, but it just goes to show what this router can do.