WorksheetsITT640 Part 1
Total questions: 58
Worksheet time: 29mins
Who demonstrated wireless telegraphy using EM waves in 1897?
Nikola Tesla
Heinrich Hertz
Guglielmo Marconi
Jagadish Bose
The work of Heinrich Hertz was mainly on:
Frequency hopping
Microwave transmission
Electromagnetic wave transmission
Optical fiber
Who invented the method for changing frequencies to avoid interference?
Edison
Tesla
Marconi
Lamarr
What early wireless technology did Hedy Lamarr help develop?
Infrared
Bluetooth
Frequency hopping
GPS
Which protocol in ALOHAnet inspired CSMA/CD?
OSI Layer 3
TCP
ALOHA
IPv4
What does the term “Wi-Fi” stand for?
Wireless Fidelity
Wireless Interference
It’s just a brand name
Wireless Integration Function
What year did IEEE ratify the original 802.11 standard?
1991
1997
2001
1989
The Wireless Ethernet Compatibility Alliance (WECA) is now called:
IEEE
Wi-Fi Tech
Wi-Fi Alliance
Wireless Group
When did ALOHAnet emerge?
1990
1940
1970
1985
Spread spectrum technology was first used:
In 1980s
During World War II
In 1995
For 5G
One major benefit of wireless communication is:
Cable efficiency
Mobility
High cost
Need for routers
Wireless communication is especially useful in:
Metro cities only
Wired networks
Remote areas
Fiber optic zones
Which of the following is a disadvantage of wireless communication?
Flexibility
Security issues
Cost-effective
High-speed
Why is wireless suitable for historical buildings?
Higher speed
It uses old tech
No drilling required
Requires less labor
What can affect wireless signal performance?
Cable length
Signal clarity
Interference
Fiber capacity
What does RF stand for?
Random Frequency
Radio Fidelity
Radio Frequency
Reactive Field
What is a reliability benefit of wireless?
No need for data
Cannot be intercepted
Cables can’t be damaged
Data is encrypted
What makes wireless easy to install?
Fiber optics
No need for routers
No cabling
Satellites
Wireless setup is ideal for disaster zones because:
Wired is faster
Wireless needs satellites
Requires fewer hardware
Power is consistent
What health concern is linked to wireless?
UV radiation
Infrared reflection
RF radiation
Microwave poisoning
Which system is a full-duplex wireless communication?
Walkie-talkie
Radio broadcast
Mobile phone
TV broadcast
Which wireless tech is used in location services?
Bluetooth
GPS
ZigBee
Radar
Which is not a type of EM wave used in wireless?
Gamma rays
Microwave
Infrared
Sound waves
What modulation type is used in wireless?
PCM
QPSK
AC
XLR
What’s the final step in the reception path?
Demodulation
Channel decoding
Decryption
Source decoding
Which element adds redundancy to handle noise?
Modulator
Channel Encoder
Source Decoder
Multiplexer
What is the medium for wireless signals?
Copper wire
Open space
Ethernet cable
Fiber
OFDMA is used in:
Wi-Fi 4
Wi-Fi 6
4G
Bluetooth
What does MU-MIMO improve?
RAM
Security
Bandwidth sharing
Encryption
What device splits signals for multiple receivers?
Source encoder
Demultiplexer
Modulator
Router
What is a key feature of 5G?
Higher latency
Lower speed
Ultra-low latency
Weak signal
Wi-Fi 6 helps reduce:
Encryption
Channel spacing
Bandwidth congestion
Cabling
What allows Wi-Fi 6 devices to save battery?
Beamforming
TWT (Target Wake Time)
OFDM
LTE
Which feature allows multiple Wi-Fi 6 users to share one channel?
MIMO
OFDMA
TDM
IPv6
What is a current concern in wireless networks?
Too many wires
Too much memory
Interference
Low traffic
Security in wireless is weaker due to:
Encryption
Open space medium
Firewalls
Radio blockers
Which layer does Wi-Fi mostly operate on?
OSI Layer 4
Layer 3
Layer 1 and 2
Layer 6
MU-MIMO in Wi-Fi 6 improves:
Range
Signal loss
Efficiency
Costs
What 5G feature helps prevent road collisions?
XR
Drone support
Connected vehicles
Faster SMS
Wi-Fi 6 uses previously unused:
Wi-Fi bands
Satellite waves
2.4 GHz spectrum
GPS
What is one proposed feature of 6G?
4G compatibility
Satellite-free design
Enhanced positioning accuracy
OFDM removal
TSN stands for:
Telecom Service Network
Time-Sensitive Networking
Time-Saving Network
Transmit Stream Network
Which future tech extends frequency range up to 71 GHz?
ZigBee
Wi-Fi 5
FR2 millimeter wave
TDM
IAB in wireless stands for:
Internet Access Bridge
Integrated Access and Backhaul
Instant Access Band
Internal Access Block
What technology is expected to support traffic management?
XR
V2X
IoT only
NFC
Which technology enables wireless broadband in remote areas?
GPS
Satellite communications
3G
RFID
What is the target indoor positioning accuracy of future wireless tech?
30 meters
10 meters
3 meters
1 meter
Wi-Fi via 5G allows:
Wired backup
Dynamic pricing
Seamless integration
Slower connection
What direction is being improved in MIMO?
Size
Cost
Performance
Access speed
What is expected in 6G networks?
Voice-only features
More cables
Integrated satellite and 5G IoT
Reduced spectrum
Which of the following is used in devices like remote controls?
Broadcast radio
Infrared
Microwave
Satellite
Which wireless transmission media requires a line of sight and is blocked by obstacles?
Cellular radio
Microwave
Infrared
Satellite
Which is NOT an advantage of infrared transmission?
High noise immunity
Low power usage
Long transmission range
High security
Which wireless media is commonly used in mobile phones?
Microwave
Cellular radio
Infrared
Satellite
Bluetooth, Wi-Fi, and WiMAX are examples of:
Infrared tech
Broadcast radio
Satellite links
Wired protocols
Which medium uses earth-based reflective dishes?
Cellular radio
Microwave
Infrared
Broadcast radio
What transmission involves an uplink and a downlink?
Infrared
Microwave
Satellite
Cellular
What is a limitation of microwave communication?
Low speed
Poor mobility
Requires line-of-sight
High cost
