1. The primary advantage of wireless communication over wired communication is:
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Explanation:
The primary advantage of wireless communication is the mobility and flexibility it offers, as it allows users to move freely without being limited by physical wires or cables.
2. In wireless communication, the term 'RF' stands for:
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RF stands for Radio Frequency, which refers to the rate of oscillation in the electromagnetic spectrum where radio waves and wireless signals operate.
3. Wi-Fi is a technology used for:
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Wi-Fi is a technology used for wireless local area networking, allowing electronic devices to connect to a wireless LAN (WLAN) network, mainly using the 2.4 GHz and 5 GHz radio bands.
4. Which frequency band is commonly used for cellular communication?
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Explanation:
The Ultra High Frequency (UHF) band, typically ranging from 300 MHz to 3 GHz, is commonly used for cellular communication networks.
5. Bluetooth technology is primarily used for:
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Explanation:
Bluetooth is a wireless technology standard used for exchanging data over short distances, creating personal area networks with high levels of security.
6. The main challenge in wireless communication is:
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One of the main challenges in wireless communication is signal attenuation, where the signal strength decreases over distance or through obstacles like buildings and trees.
7. In wireless communication, MIMO stands for:
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MIMO (Multiple Input, Multiple Output) is a technology used in wireless communications where multiple antennas are used at both the transmitter and receiver to improve communication performance.
8. The 5G technology in wireless communication aims to offer:
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5G is the fifth-generation technology standard for cellular networks, aiming to provide higher data rates, reduced latency, and more reliable connections than its predecessor, 4G.
9. The term 'LOS' in wireless communication stands for:
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LOS, or Line Of Sight, refers to a straight and clear path between the transmitter and receiver in wireless communication, essential for effective signal transmission.
10. Frequency Hopping Spread Spectrum (FHSS) is used in wireless communication to:
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Frequency Hopping Spread Spectrum (FHSS) is a method where the signal is rapidly switched between many frequency channels, minimizing interference and improving security in wireless communication.
11. The Global Positioning System (GPS) primarily utilizes which frequency band?
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GPS primarily utilizes the L-band of the radio frequency spectrum, which includes frequencies in the 1-2 GHz range, suitable for transmitting through the atmosphere.
12. NFC technology, used in wireless communication, stands for:
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NFC, or Near-Field Communication, is a set of communication protocols that enable two electronic devices to establish communication by bringing them within a very short distance of each other.
13. The primary challenge of millimeter-wave communication in 5G networks is:
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Explanation:
Millimeter-wave communication, used in 5G networks, faces the challenge of higher signal attenuation and limited range due to the shorter wavelengths and higher frequencies of millimeter waves.
14. In wireless communication, 'handover' refers to:
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Handover in wireless communication is the process of transferring an ongoing call or data session from one cell in a network to another as the user moves around.
15. Which technology allows wireless communication devices to exchange data over short distances using UHF radio waves?
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Explanation:
Bluetooth technology enables wireless communication over short distances using UHF radio waves, typically within a range of up to 10 meters.
16. The primary purpose of a repeater in wireless communication networks is to:
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A repeater in wireless communication networks is used to amplify and retransmit signals, extending the range and coverage of the network.
17. Zigbee technology is primarily used for:
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Explanation:
Zigbee is a specification for a suite of high-level communication protocols using small, low-power digital radios for short-range, low-power wireless communication.
18. In LTE (Long Term Evolution), MIMO technology is used to:
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In LTE networks, MIMO (Multiple Input Multiple Output) technology is used to improve signal strength and data transmission speeds by using multiple antennas at both the transmitter and receiver ends.
19. The primary function of an Access Point (AP) in wireless networks is to:
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An Access Point in wireless networks acts as a bridge, connecting wireless devices to a wired network, allowing these devices to communicate with each other and access network resources.
20. In wireless communication, OFDM stands for:
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OFDM, or Orthogonal Frequency Division Multiplexing, is a method of encoding digital data on multiple carrier frequencies and is widely used in modern broadband communication systems for its efficiency and resistance to interference.
21. The main advantage of using Ultra-Wideband (UWB) technology in wireless communication is its:
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Ultra-Wideband (UWB) technology is known for its ability to provide high data transfer rates over short distances, making it ideal for applications like wireless USB.
22. The term 'spectrum efficiency' in wireless communication refers to:
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Spectrum efficiency in wireless communication refers to the effective use of the bandwidth in transmitting the maximum possible amount of data with minimal errors and interference.
23. In wireless communication, the 'hidden node problem' occurs when:
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The hidden node problem in wireless networks occurs when two nodes can communicate with a common access point but are not within each other's range, leading to potential data collisions.
24. Beamforming technology in wireless communication is used to:
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Explanation:
Beamforming is a technology used in wireless communication systems to direct wireless signals towards a specific direction, enhancing signal strength and reducing interference.
25. In wireless networks, QoS stands for:
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QoS, or Quality of Service, in wireless networks refers to the overall performance of the network, including factors like transmission rates, error rates, and overall network reliability.