Which of the following describes how Sara, an attacker, can send unwanted advertisements to a
mobile device?

A.
Man-in-the-middle

B.
Bluejacking

C.
Bluesnarfing

D.
Packet sniffing

Explanation:
Bluejacking is the sending of unsolicited messages over Bluetooth to Bluetooth-enabled devices
such as mobile phones, PDAs or laptop computers, sending a vCard which typically contains a
message in the name field (i.e., for bluedating or bluechat) to another Bluetooth-enabled device

via the OBEX protocol.
Bluetooth has a very limited range, usually around 10 metres (32.8 ft) on mobile phones, but
laptops can reach up to 100 metres (328 ft) with powerful (Class 1) transmitters.
Bluejacking is usually harmless, but because bluejacked people generally don’t know what has
happened, they may think that their phone is malfunctioning. Usually, a bluejacker will only send a
text message, but with modern phones it’s possible to send images or sounds as well. Bluejacking
has been used in guerrilla marketing campaigns to promote advergames.