Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Multiple Choice Questions
Q1591: Infrared waves have wavelengths ranging from ______.
- A: 770 nm to 10 cm
- B: 770 nm to 1 mm
- C: 1 mm to 10 m
- D: 700 nm to 900 nm
View Answer
B
Q1592: What is the advantage of infrared waves not penetrating walls?
- A: It increases range
- B: It allows multipath propagation
- C: It reduces interference
- D: None of these
View Answer
C
Q1593: Which of the following uses infrared communication?
- A: Bluetooth
- B: Wi-Fi
- C: TV remote control
- D: Radio transmitter
View Answer
C
Q1594: Unidirectional antennas are useful because they ______.
- A: Transmit signals in all directions
- B: Absorb noise from all sides
- C: Focus energy in a single direction
- D: Use multiple frequency bands
View Answer
C
Q1595: What is one benefit of microwave’s unidirectional property?
- A: Higher latency
- B: Higher noise
- C: Focused transmission
- D: Wall penetration
View Answer
C
Q1596: Fill in the blank: ______ waves are typically blocked by obstacles like walls, making them suitable for isolated room communication.
- A: Microwaves
- B: Infrared
- C: Radio waves
- D: Gamma rays
View Answer
B
Q1597: Which type of waves are best suited for use within a single room?
- A: Microwaves
- B: Infrared
- C: X-rays
- D: UV rays
View Answer
B
Q1598: Microwaves are unidirectional. What does that imply?
- A: They spread in all directions
- B: They need no antenna
- C: They travel in one direction only
- D: They reflect off walls
View Answer
C
Q1599: What is a network?
- A: A single device
- B: An isolated computer
- C: A group of connected devices
- D: A storage system
View Answer
C
Q1600: What is the main challenge when trying to connect multiple devices in a network?
- A: Storing data
- B: Transmitting power
- C: Making one-to-one communication possible
- D: Installing software
View Answer
C