When pairing two devices over Bluetooth, typically only one of the devices needs to be set to discoverable mode. The other device, which initiates the connection, scans for available devices and does not need to be discoverable itself. This question might trip up individuals who associate 'discoverability' as a requirement on both sides, which is not the case in most Bluetooth pairing scenarios.
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What does it mean for a device to be discoverable in Bluetooth?
How does the Bluetooth pairing process work?
What are the potential security risks when pairing Bluetooth devices?