Why my wifi internet status changes to no internet, secured when I connect VPN?

[Learner2011]

So, I posted below question on Microsoft page and the person replied stating when I connect VPN it provides me internet access, which explains the behavior of Windows I have shown in the link below. Now, I was under the impression that you have to have Internet first in order to use VPN. So, now I am sort of lost. Can anyone help me understand behavior of Windows after I connect VPN using Cisco AnyConnect Secure Mobility Client version 4 as shown on the link below and help me understand it?

https://answers.microsoft.com/en-us/windows/forum/all/why-my-wifi-internet-status-changes-to-no-internet/c1395494-1bd4-439d-af89-424382de6029

[Karsten Iwen]

You are right that you need internet access to establish the VPN. But the moment the VPN establishes, all your traffic is under control of the VPN-gateway and can restrict or allow your traffic to the internet. Ask the Admin of the VPN-gateway about the  applied policy.

[Learner2011]

Thanks for reply. If you could look my post on Microsoft page as well. I would appreciate that has screenshots of my questions and answers I am looking for and what caused confusion in my mind about Internet and VPN.

Thanks in advance.

[Karsten Iwen · Accepted solution]

So you get confused by the changed Icon? Here is what happens:

1. You have your working WiFi internet-connection.
2. The AnyConnect-Client builds a secure tunnel to the VPN gateway.
3. AnyConnect activates a virtual network-interface and routes all traffic through this new interface. This is the new icon in your tray. Think of a long virtual cable to the VPN-Gateway.
4. As all traffic is now sent through this new connection, Windows shows that internet is available here, but not on the wireless network.

[Learner2011]

Thanks. You explained it in a very easy to understand way.