Bram van den Heuvel wrote on 7/10/2017 7:14 PM:
How does Windows 10 handle manual & automatic switching between Internet
WiFi & Ethernet connections?

Does it automatically switch based on the best signal strength?
Or does it automatically switch based on some test speed?

If I want to manually change from one connection to the other, how do I do
that?

# I have a desktop with no WiFi card.
# On a USB port, I have a $25 AC1200 TP Link "T4U" wifi dongle
(FCCID TE7T4U, IC 8853A-T4U) https://fccid.io/TE7T4U
# On the Ethernet port, I have an Ubiquiti Nanobeam M2 (802.11n)
(FCCID SWX-NBM2HP, IC 6545A-NBM2HP)

My two questions are
1. How does Windows automatically decide which to use?
2. How do I manually switch from one to the other?


https://support.microsoft.com/en-us/help/299540/an-explanation-of-the-automatic-metric-feature-for-ipv4-routes

The Automatic Metric feature can be useful when the routing table contains multiple routes for the same destination. For example, if you have a computer with a 10 megabit (Mb) network interface and a 100 Mb network interface, and the computer has a default gateway that is configured on both network interfaces, the Automatic Metric feature assigns a higher metric to the slower network interface. This feature can force all of the traffic that is destined for the Internet, for example, to use the fastest network interface that is available.

Basically, Windows chooses the fastest link. You can override this by
adjusting the automatically assigned metric. To adjust the metric, open
the adapter properties Internet Protocol Version 4 General
Advanced and disable Automatic metric. The adapter with the lowest value
is the one Windows will choose.

If you only need a particular adapter to be used temporarily, it might
be easier to either manually disconnect from wireless or disable the
adapter (right-click Disable), rather than setting the metric manually.