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universenz | 4 years ago

Further to this, doesn't Chrome and Safari quietly auto-ping/reload pages that "fail to connect" if they're left open in a tab or browser?

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yawaworht1978|4 years ago

How often do the apps try to reconnect? Does anyone know?

vakabus|4 years ago

I've launched Wireshark monitoring DNS traffic of roughly 5 phones. I've collected 19.8k DNS packets so far. Out of that, 5.1k packets are flagged with REFUSED or SERVFAIL. If I am not mistaken, it means that 51% of DNS requests fail.

Looking at queries for graph.instagram.com, it looks like there are roughly 20 attempts in a sequence before it gives up.

All in all, this could probably explain doubling of the DNS traffic. But the sample is rather small, so take it with a grain of salt.