Which of the following are characteristics of Bluetooth? (Select two.)
answer
Line-of-sight transmission
Ad hoc connections
Red spectrum light waves
2.4 GHz radio wireless
5.75 GHz radio wireless
The Correct Answer and Explanation is:
The correct answers are:
- Ad hoc connections
- 2.4 GHz radio wireless
Explanation:
Bluetooth is a widely used wireless technology standard for exchanging data over short distances. It is commonly used for connecting devices like headphones, keyboards, mice, smartphones, and other peripherals without the need for cables.
- Ad hoc connections:
Bluetooth devices form ad hoc networks, meaning they can create spontaneous and temporary connections without requiring a fixed infrastructure like a router or access point. This allows devices to connect directly to each other as needed, typically within a range of about 10 meters (33 feet) for classic Bluetooth or up to 100 meters for some versions like Bluetooth Class 1 devices. This capability is essential for peer-to-peer communications, such as sharing files or connecting wireless accessories. - 2.4 GHz radio wireless:
Bluetooth operates in the 2.4 GHz ISM (Industrial, Scientific, and Medical) radio band, which is an unlicensed frequency spectrum available worldwide. This frequency range is shared by many other devices such as Wi-Fi routers, microwave ovens, and cordless phones. Bluetooth uses frequency-hopping spread spectrum technology within this band to reduce interference and improve security by rapidly switching frequencies during transmission.
Why the other options are incorrect:
Summary:
Bluetooth’s key characteristics include its ability to create ad hoc connections and use 2.4 GHz radio frequency for communication. It provides a flexible, short-range wireless link for personal area networks (PANs) without requiring line-of-sight or specialized infrastructure, making it highly versatile for consumer electronics and other applications.