格物 Whence

Whence lays open where the devices around you actually come from — what you are connected to, and what you are holding. ■ Looking outward: what your Wi-Fi actually is • Reads the BSSID of the access point you're on and resolves the manufacturer from the IEEE registry • When the BSSID is a locally administered address, it says so — such addresses do not identify a real manufacturer. The three possible causes are shown side by side rather than picking one for you. ■ Looking inward: what this iPhone is made of • Core split, native resolution and refresh rate, per-lens camera parameters, sensors and radios, storage and power — all measured directly • Model specifications from a bundled catalog, cross-checked against what was measured, with the result shown either way ■ Every value is labeled with where it came from Measured, catalog, inferred, unavailable — four distinct provenance levels.…