3 ms·

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?

• yawaworht1978 5y ago
  How often do the apps try to reconnect? Does anyone know?
  • vakabus 5y 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.
    • dotancohen 5y ago
      5.1 / 19.8 is much closer to a quarter than to half. But your point is still just as poignant at ~25% as it is at 51%.
      • profile53 5y ago
        I think those are DNS round trips. So 1 packet to request and 1 to respond. E.g. 9.9k total requests of which 5.1k fail.