Bluetooth is extremely secure in that it employs several layers of data encryption and user authentication measures. Bluetooth devices use a combination of the Personal Identification Number (PIN) and a Bluetooth address to identify other Bluetooth devices. Data encryption (i.e., 128-bit) can be used to further enhance the degree of Bluetooth security. The transmission scheme (FHSS) provides another level of security in itself. Instead of transmitting over one frequency within the 2.4 GHz band, Bluetooth radios use a fast frequency-hopping spread spectrum (FHSS) technique, allowing only synchronized receivers to access the transmitted data

• Is it possible to connect multiple Bluetooth hubs?
• List some Technology characteristic of Bluetooth?
• Which method is primarily used for Voice transfer?
• What is the strength of the signal transmitted by powerful cell phones?
• What are the other (competing or not) wireless technologies?

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