How do devices check internet connectivity?

jesus767 il y a 4 ans

When you lose internet access (while still connected to your LAN) , windows, android, and iOS (and maybe macOS) all give some indication that your network lacks internet access (e.g. "Connected, No Internet" on android iirc). So they must be periodically checking to see if your device has internet access.

I'm guessing they do it by pinging some IP address or another. But how can I know for certain what exactly they are doing and which address (or domain) they are pinging if that is what they're doing?

https://192168o1.com.br/
https://19216801login.com.br/
https://logintplink.com.br/

Modifié il y a 4 ans, le mardi 24 novembre 2020 à 10:07

conyrnueu45 il y a 24 jours

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victoriasykes il y a 1 jour

Devices check internet connectivity by periodically trying to reach a reliable server, usually through ICMP (ping) requests or HTTP requests, to verify access to the broader internet. While the exact server or domain used can vary between operating systems and network configurations, common destinations include public servers like Google's DNS server (8.8.8.8) or specific web services like connectivitycheck.android.com for Android. On Windows, it may use a similar method, pinging domains like www.msftconnecttest.com to detect internet access. To verify which domain or IP is being pinged, you can monitor network traffic using tools like Wireshark or check your system's network configuration.