12-10-2020, 09:53 AM
You notice retransmissions piling up in the stream. I check for those odd duplicates popping everywhere. Errors show up in the details without much effort. Perhaps your app fails to talk properly across the link. But Wireshark lets me poke at the flow directly. Also timeouts appear in certain exchanges between machines.
Or maybe DNS queries drag on longer than expected. I watch responses come back late from servers. You fix routing problems after seeing mismatched addresses. Fragments arrive out of order sometimes during peaks. Then bandwidth hogs eat resources without warning signs. Perhaps port scans hit your setup from unknown sources.
I compare timings across multiple captures you send over. Unusual spikes point to overloaded devices nearby. You trace application hangs back to bad handshakes. Errors in headers cause drops that nobody expects. Also collisions happen when devices clash on the wire.
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