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  1. TCP/IP8 min

    Fast internet. Full inbox. Nothing moves.

    A photo upload can stall on a perfectly usable connection. The receiver needs room to accept more bytes. More bandwidth cannot negotiate with a full tray.

  2. Linux internals8 min

    The server is busy. Your repair booking is waiting.

    Utilization says the machine is occupied. Linux pressure signals show time lost waiting for resources. The distinction reaches all the way to the person trying to book a repair.