| Blue tooth is a telecommunications device for | | | | but the frequencies and protocols are different |
| wireless personal area network which describes | | | | and both of them are not compatible on the |
| how mobile phones, computers, laptops, printers, | | | | same device. The speed and the power of a blue |
| video game consoles and digital camera can be | | | | tooth are lower than that of wi-fi. To pair one |
| interconnected using a short range wireless | | | | blue tooth device to another, a pass code must |
| connection. With the help of this technology, users | | | | be exchanged between the two devices. While |
| of cell phones, personal digital assistants and | | | | connecting the first, it asks for a 4-digit pass |
| pagers can get synchronized with information and | | | | code and then the other device asks for the pass |
| have all mobile and computer devices be fully | | | | code where the same pass code must be given. |
| coordinated. The term blue tooth derived its | | | | There are many advantages and disadvantages |
| name from a tenth century Denmark king Herald | | | | of blue tooth. Since it is a wireless device, there is |
| blue tooth Blatand who united Denmark and | | | | no need for connection cables and can be used |
| Norway and was famous for his ability to help | | | | while traveling also. Blue tooth is inexpensive and |
| people to communicate with each other. | | | | automatic. When two or more devices come |
| To include blue tooth facility, a low cost | | | | closer within the range of 30 feet to each other, |
| transceiver chip must be included in each device, | | | | they automatically start communicating. Blue tooth |
| which transmits and receives in an unused | | | | has a standardized protocol. Blue tooth uses the |
| frequency band available globally. | | | | technology called frequency hopping and avoids |
| Blue tooth enables short-range wireless | | | | interference with other wireless devices. |
| connections between desktop and laptop | | | | The energy consumption of blue tooth will not |
| computers and a host of other peripheral devices | | | | drain the battery. Data and voice communication |
| for worldwide compatibility on an internationally | | | | can be shared using blue tooth, which is of great |
| available frequency band. | | | | use for mobile phones and headsets. Upto seven |
| Since blue tooth uses radio waves in 2.4-gigahertz | | | | blue tooth devices can be connected to each |
| range, it is designed such that it is a safe and | | | | other within a range of 30 feet. Blue tooth has |
| inexpensive way of connecting and exchanging | | | | practically enormous applications. |
| information between devices without wires. Since | | | | There are a few disadvantages too with a blue |
| it uses a common protocol, transmission of data | | | | tooth. Blue tooth offers data transfer rate in the |
| between two blue tooth devices from various | | | | range of 1 MB ps while the data transfer rate is |
| manufacturers would be straightforward. If the | | | | comparatively faster for infrared which has a rate |
| mobile phone has blue tooth hardware, blue tooth | | | | of 4 MB ps. Security is a drawback of blue tooth |
| drivers are not necessary because the software | | | | while infrared has inherent security due to its line |
| is inbuilt and ready for use. Then blue tooth can | | | | of sight. Blue tooth is prone to interception and |
| be used to beam the photos and other objects | | | | attack due to its great range and radio frequency. |
| from the mobile phone to the laptop or a PC | | | | The advantages of blue tooth surpass the |
| provided the PC also has the blue tooth. | | | | disadvantages and therefore blue tooth is still by |
| Blue tooth and wi-fi are both radio technologies | | | | far the best for short-range wireless technology. |