Apparently as a response to the recently discovered (and patched) KRACK exploit, Samsung added a VPN service to the Galaxy Note 8. Known as "Secure Wi-Fi," this service encrypts all outgoing traffic to provide safe browsing while connected to unsecured public networks.
https://www.notebookcheck.net/Samsung-Galaxy-Note-8-gets-a-VPN-service-with-the-latest-update.267974.0.html