Q.1 What is the primary advantage of wireless networks over wired networks?
Higher data transmission speed
Mobility and ease of installation
Lower latency
Better security
Explanation - Wireless networks allow devices to connect without physical cables, providing mobility and easier installation.
Correct answer is: Mobility and ease of installation
Q.2 Which frequency band is commonly used in Wi-Fi networks?
2.4 GHz and 5 GHz
900 MHz and 1.8 GHz
10 GHz and 60 GHz
450 MHz and 800 MHz
Explanation - Wi-Fi networks commonly operate in the 2.4 GHz and 5 GHz frequency bands to balance range and speed.
Correct answer is: 2.4 GHz and 5 GHz
Q.3 Which of the following is NOT a cellular network generation?
2G
3G
4G
5T
Explanation - Cellular network generations include 2G, 3G, 4G, and 5G. '5T' is not a recognized generation.
Correct answer is: 5T
Q.4 What is the main purpose of a base station in a mobile network?
To store data for mobile devices
To route traffic on the internet
To provide wireless coverage to mobile devices
To increase battery life of mobile devices
Explanation - A base station provides radio coverage for mobile devices, connecting them to the cellular network.
Correct answer is: To provide wireless coverage to mobile devices
Q.5 Which technology is primarily used for short-range wireless communication between devices?
Wi-Fi
Bluetooth
LTE
5G
Explanation - Bluetooth is designed for short-range communication, typically under 100 meters, for personal devices.
Correct answer is: Bluetooth
Q.6 In wireless networks, what does SSID stand for?
Secure Service ID
Service Set Identifier
System Security ID
Signal Strength Identifier
Explanation - SSID is the unique name that identifies a wireless network.
Correct answer is: Service Set Identifier
Q.7 Which of the following is a challenge specific to wireless networks compared to wired networks?
Signal interference
High installation cost
Limited mobility
Complex cabling
Explanation - Wireless networks face challenges like interference, fading, and signal loss due to the environment.
Correct answer is: Signal interference
Q.8 What does LTE stand for in mobile networks?
Long-Term Evolution
Low Transmission Energy
Local Telecommunication Exchange
Large Transfer Ethernet
Explanation - LTE is a standard for high-speed wireless communication in mobile networks.
Correct answer is: Long-Term Evolution
Q.9 Which layer of the OSI model primarily deals with wireless transmission?
Physical layer
Transport layer
Application layer
Network layer
Explanation - The physical layer handles the transmission of raw bits over the wireless medium.
Correct answer is: Physical layer
Q.10 Which type of wireless network is used to cover a small area like a home or office?
MAN
WAN
PAN
LAN
Explanation - A Wireless LAN (WLAN) covers small areas like offices and homes.
Correct answer is: LAN
Q.11 What is handoff in mobile networks?
Switching from one base station to another without dropping the connection
Transmitting data at higher speeds
Encrypting wireless data
Registering a new mobile device
Explanation - Handoff ensures continuous connectivity as a mobile device moves across cells.
Correct answer is: Switching from one base station to another without dropping the connection
Q.12 Which protocol is used for secure communication over wireless networks?
WEP
WPA2/WPA3
HTTP
FTP
Explanation - WPA2 and WPA3 are security protocols used to encrypt and secure Wi-Fi communications.
Correct answer is: WPA2/WPA3
Q.13 In mobile networks, what does the term 'cell' refer to?
A type of battery in mobile devices
Coverage area of a base station
A memory unit
A type of network protocol
Explanation - A cell represents the area served by a single base station in a mobile network.
Correct answer is: Coverage area of a base station
Q.14 Which of the following is a primary feature of 5G networks?
Low latency and high data rates
Limited device connectivity
Shorter coverage range only
Analog signal transmission
Explanation - 5G provides faster speeds, lower latency, and supports massive device connectivity.
Correct answer is: Low latency and high data rates
Q.15 What does the term 'mesh network' mean in wireless networking?
All devices connect to a single central router
Devices communicate directly with each other to extend coverage
Devices use only wired connections
Only one device transmits data at a time
Explanation - Mesh networks allow devices to relay data to improve coverage and reliability.
Correct answer is: Devices communicate directly with each other to extend coverage
Q.16 Which wireless technology is used for high-speed connections over short distances like cable replacement?
Infrared
NFC
WiGig
Satellite
Explanation - WiGig provides multi-gigabit wireless communication over short distances.
Correct answer is: WiGig
Q.17 What is the main limitation of mobile networks operating at higher frequency bands?
Increased interference from walls and obstacles
Lower data rates
Longer battery life
Limited device compatibility
Explanation - Higher frequencies have less penetration, so obstacles like walls reduce signal strength.
Correct answer is: Increased interference from walls and obstacles
Q.18 Which of the following is a key characteristic of Mobile Ad-hoc Networks (MANETs)?
Require central base stations
Self-configuring and infrastructure-less
Fixed routing paths
Only work indoors
Explanation - MANETs do not rely on fixed infrastructure; nodes dynamically form and maintain the network.
Correct answer is: Self-configuring and infrastructure-less
Q.19 Which multiple access technique is widely used in 4G LTE networks?
FDMA
TDMA
CDMA
OFDMA
Explanation - OFDMA divides the frequency into subcarriers, enabling multiple users to transmit simultaneously in LTE.
Correct answer is: OFDMA
Q.20 In wireless sensor networks, which factor is the most critical to prolong network lifetime?
Signal range
Node energy consumption
Data packet size
Network topology only
Explanation - Efficient energy management in nodes is crucial for long-lasting wireless sensor networks.
Correct answer is: Node energy consumption
Q.21 Which of the following is a characteristic of mobile cloud computing?
Cloud resources accessed through mobile devices
Requires only wired connections
Data stored only locally on devices
Uses traditional LAN protocols
Explanation - Mobile cloud computing allows mobile devices to access computation and storage resources in the cloud.
Correct answer is: Cloud resources accessed through mobile devices
Q.22 Which wireless communication standard is primarily used for mobile payments?
NFC
Bluetooth
Wi-Fi
LTE
Explanation - Near Field Communication (NFC) allows secure contactless payments and short-range data exchange.
Correct answer is: NFC
Q.23 What is the purpose of MIMO technology in wireless networks?
Increase range only
Transmit multiple data streams simultaneously to increase throughput
Provide encryption
Reduce latency only
Explanation - MIMO (Multiple Input Multiple Output) uses multiple antennas to send/receive parallel data streams, enhancing speed and reliability.
Correct answer is: Transmit multiple data streams simultaneously to increase throughput
Q.24 Which wireless network topology connects all devices in a single line?
Star topology
Ring topology
Bus topology
Mesh topology
Explanation - In a bus topology, all devices are connected along a single communication line, though less common in modern wireless networks.
Correct answer is: Bus topology
Q.25 Which technique reduces interference in wireless networks by separating channels in time or frequency?
Multiplexing
Handoff
Routing
Flow control
Explanation - Multiplexing (like TDMA or FDMA) separates signals in time or frequency to reduce interference among users.
Correct answer is: Multiplexing