Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 206
Q3221:
Which of the following problems is specific to wireless networks?
A. Interference
B. Signal routing
C. Network congestion
D. Firewall attacks
Correct Answer:
A
Chapter: 206
Q3222:
In wireless communication, _______ is the loss of signal strength as it travels over a distance.
A. Attenuation
B. Propagation
C. Error
D. Multipath
Correct Answer:
A
Chapter: 206
Q3223:
Which factor does NOT significantly affect the performance of wired LANs?
A. Interference
B. Signal loss
C. Distance
D. None of the above
Correct Answer:
A
Chapter: 206
Q3224:
What is the effect of interference in a wireless LAN?
A. It can reduce signal quality and communication speed
B. It improves signal strength
C. No effect on performance
D. Only affects wired connections
Correct Answer:
A
Chapter: 206
Q3225:
Fill in the blank: Multipath propagation in wireless communication can cause _______ in signal reception.
A. Interference
B. Better signal strength
C. Attenuation
D. High speed of data transfer
Correct Answer:
A
Chapter: 206
Q3226:
Which characteristic is unique to wireless LANs compared to wired LANs?
A. Multipath propagation
B. Low data rates
C. Fixed connectivity
D. None of the above
Correct Answer:
A
Chapter: 206
Q3227:
Which of the following is a common cause of signal attenuation in wireless networks?
A. Distance from the access point
B. High interference levels
C. Low battery power
D. Device overheating
Correct Answer:
A
Chapter: 206
Q3228:
Fill in the blank: _______ occurs when multiple signals from different sources arrive at the receiver at slightly different times, causing interference.
A. Multipath propagation
B. Attenuation
C. Interference
D. Error
Correct Answer:
A
Chapter: 206
Q3229:
What does the term "interference" refer to in the context of wireless LANs?
A. The disruption of signal quality by other electronic devices
B. Device overheating causing signal failure
C. Device disconnection
D. None of the above
Correct Answer:
A
Chapter: 206
Q3230:
Which of the following affects wireless LANs but not wired LANs?
A. Multipath propagation
B. Signal attenuation
C. High data transfer rate
D. None of the above
Correct Answer:
A
Chapter: 206
Q3231:
Fill in the blank: _______ refers to the bending and scattering of radio waves as they pass through various obstacles in their path.
A. Multipath propagation
B. Signal enhancement
C. Noise interference
D. Wave attenuation
Correct Answer:
A
Chapter: 206
Q3232:
Which of the following is NOT a characteristic of wireless LANs?
A. High attenuation
B. Fixed and stable connections
C. Interference
D. Multipath propagation
Correct Answer:
B
Chapter: 206
Q3233:
Which of the following is a challenge faced by wireless LANs but not by wired LANs?
A. Attenuation
B. Signal stability
C. Device disconnection
D. Fixed connections
Correct Answer:
A
Chapter: 206
Q3234:
What is the primary cause of signal attenuation in a wireless network?
A. Distance between devices and access points
B. Physical connections between devices
C. Distance between routers
D. Number of devices connected
Correct Answer:
A
Chapter: 206
Q3235:
Which of the following terms refers to the effect of objects causing the signal to scatter and take multiple paths in a wireless network?
A. Multipath propagation
B. Attenuation
C. Propagation loss
D. Interference
Correct Answer:
A
Chapter: 206
Q3236:
Fill in the blank: _______ in wireless networks can lead to slower data transfer and dropped connections.
A. Interference
B. Fixed connections
C. Low latency
D. High speed
Correct Answer:
A
Chapter: 206
Q3237:
What happens when signals are subjected to multipath propagation in a wireless network?
A. Signals may arrive at the receiver at different times, causing delays and interference
B. Signals are reflected, leading to better data rates
C. Signals are amplified for better quality
D. Signals are absorbed by surrounding materials
Correct Answer:
A
Chapter: 206
Q3238:
Which of the following best describes attenuation in wireless networks?
A. The weakening of a signal as it travels through the air
B. An increase in signal strength
C. The scattering of a signal across obstacles
D. An increase in data transfer rate
Correct Answer:
A
Chapter: 207
Q3239:
Which of the following is a key issue in wireless LANs?
A. Access control
B. Latency
C. Packet loss
D. Signal amplification
Correct Answer:
A
Chapter: 207
Q3240:
Fill in the blank: One of the reasons why CSMA/CD does not work in wireless LANs is that wireless hosts _______ transmit and receive at the same time.
A. cannot
B. can
C. always
D. sometimes
Correct Answer:
A