PC Doctor Godalming

Dedicated to Fixing Computers of all Shapes and Sizes
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Category: Networks

Network switches; routers; firewalls; accelerators; load balancers and other network appliances

Real World WiFi Speeds

Real World Wi-Fi Speeds

IEEE standard Wi-Fi Alliance Standard Theoretical Speed Real-world Speed
802.11ax Wi-Fi 6 10Gps 700Mbps
802.11ac Wi-Fi 5 1.3Gps 200Mbps
802.11n Wi-Fi 4 600Mbps 150Mbps

Wireless Broadband Alliance (WBA) real world trials carried out in the “hostile” environment of the Mettis Aerospace facility in the UK West Midlands.

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Free Public DNS servers

Free public DNS servers include Google, Quad9, OpenDNS, Cloudflare, CleanBrowsing, Verisign, Alternate DNS, AdGuard DNS, etc.

Here’s a short list of some of the most popular ones:


OpenDNS (,
Google Public DNS (,
Cloudflare (,


OpenDNS 2620:0:ccc::2 and 2620:0:ccd::2
Google 2001:4860:4860::8888 and 2001:4860:4860::8844
Cloudflare 2606:4700:4700::1111 and 2606:4700:4700::1001.

Eliminate slow Broadband due to faulty BT Line

If you have a slow ADSL broadband the first thing to do is eliminate a faulty line coming to the building. The best way to test this is to run a Quite Line Test. This test is not the most scientific and relies on the sensitivity of the human ear. However your ear is very good at picking up noise interference when it is supposed to be dead quiet.

This test pin-points interference between the Exchange and Master socket (the demarcation entry point into the building).

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