No internet connection after update to Tahoe 26.4.1

On your Mac, hold down the Option key, and then, click on the Wi-Fi icon in the macOS menu bar. You should be presented with a drop-down menu with a list of items.

Please provide either a screen shot of the list, or just provide us with the following values from it:

• IP Address = ? <<< This value should start with either 10, 172, or 192. If it starts with anything else, then your Mac is not communicating with your local wireless router.
• Router = ?
• Internet = ? <<< Should say "Reachable"
• Security = ?
• RSSI = ?
• Noise = ?
• PHY Mode = ?
• MCS Index = ?

An alternate method to check DNS functionality would be as follows:

1. Open the Terminal app.
2. Enter the following command at the prompt, and then, press the Enter key: ping -c5 cloudflare.com
3. If that ping fails, then enter this command: ping -c5 1.1.1.1

Note: A successful ping would result in "5 packets transmitted, 5 packets received, 0.0% packet loss" Anything else would indicate a ping failure.