With a dynamic IP address, the process looks something like this:
You tell the computer, “send the print job to the printer”.
The computer says, “ok, I need to find the printer, it might have moved since I talked to it last.”
The computer asks every other device on the network, one by one, “are you the printer?”
The printer says, “Yep, I’m the printer.”
Computer says, “Great, here’s a print job.”
And the printer prints, and everyone’s happy.
With a static IP, you can skip most of that.
You say “send the print job to the printer”, and the computer says, “I know where the printer lives. Printer, here’s a print job”.
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