Set - 3

Question 11 :

Give a generic description of Bluetooth?

Answer :

Bluetooth is a low-cost, short-range (RF) links between mobile PCs, mobile phones and other portable devices. Bluetooth can transmit through solid, non-metal objects.


Question 12 :

How does Bluetooth use frequency hopping for security?

Answer :

Bluetooth picks a random frequency out of 79 and then hops around the range about 1600 times per second.


Question 13 :

Why is Bluetooth called a cable replacement technology?

Answer :

Bluetooth technology allows the creation of Personal Area Networks without cables or wires that are usual in home networks.


Question 14 :

What is FCC and how does it relate to Bluetooth?

Answer :

FCC is Federal Communication Commission, which issues licenses to the stations for specific frequencies. It also decides who is able to use which frequency for what purpose. Since Bluetooth is using unlicensed spectrum, FCC has no direct involvement with Bluetooth


Question 15 :

What is FEC in Bluetooth?

Answer :

Forward Error Correction is a method by which Bluetooth increases its noise immunity. FEC is a method that enables a receiver to not only detect, but also correct errors in a transmission.