What is a BLE attack?

a$.$ A brute$-$force attack against APs

b$.$ A Backdoor Lock Embedded System attack, an attack that exploits poor authentication security of embedded systems

c$.$ Bluetooth Long$-$distance Exploit, an amplification attack that enables Bluetooth devices to be attacked from distances outside their normal operating range

d$.$ Bluetooth Low Energy attack, an attack against a low$-$energy consumption Bluetooth protocol variant often found in IoT devices