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No...the physical layer is just that: The wires or COAX or fiber that physically makes up your network. If the switch were to work at a physical layer it would literally be opening or closing contacts to make the wires joined together be disconnected or connected...which is NOT the case, there is no physical opening/closing going on.

Switches I was trained on (in the mid-80's) worked based on MAC addresses of devices, that unique only-this-one-device-in-the-world number burned into end units. Or there is a possibility they might work higher up the protocol chain, on the Ethernet Address. it's been too long since I was involved with zeros and ones. But certainly not on the physical layer. Hopefully someone with more recent experience will update this answer for you...

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