Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 101
Q1401:
The physical layer directly controls which of the following?
A. Application layer
B. Transmission media
C. Session layer
D. Presentation layer
Correct Answer:
B
Chapter: 101
Q1402:
Which of the following is used to transmit data using light signals?
A. Twisted pair
B. Coaxial cable
C. Optical fiber
D. Free space
Correct Answer:
C
Chapter: 101
Q1403:
The OSI layer responsible for physical signal transmission is the ______.
A. Session layer
B. Presentation layer
C. Physical layer
D. Data link layer
Correct Answer:
C
Chapter: 101
Q1404:
Which media uses electromagnetic waves to transmit data through air?
A. Optical fiber
B. Coaxial cable
C. Twisted pair
D. Free space
Correct Answer:
D
Chapter: 101
Q1405:
Which of the following is an example of free space transmission media?
A. Twisted pair
B. Fiber optic
C. Air
D. Coaxial cable
Correct Answer:
C
Chapter: 101
Q1406:
Which one of the following belongs to layer zero of the network model?
A. Physical devices
B. Transmission media
C. Transport layer
D. Network layer
Correct Answer:
B
Chapter: 101
Q1407:
In which medium does data travel as electrical signals?
A. Optical fiber
B. Twisted pair
C. Free space
D. Infrared
Correct Answer:
B
Chapter: 101
Q1408:
What kind of signals are used in optical fiber cables?
A. Electrical signals
B. RF signals
C. Light signals
D. Sound signals
Correct Answer:
C
Chapter: 101
Q1409:
What differentiates optical fiber from metallic media?
A. It carries electricity
B. It uses magnetic pulses
C. It uses light to transmit data
D. It requires grounding
Correct Answer:
C
Chapter: 101
Q1410:
Fill in the blank: ______ and coaxial cables are examples of metallic media.
A. Twisted pair
B. Optical fiber
C. Fiber optics
D. Microwave
Correct Answer:
A
Chapter: 102
Q1411:
Transmission media are categorized into ______ types.
A. 1
B. 2
C. 3
D. 4
Correct Answer:
B
Chapter: 102
Q1412:
Which of the following is a type of guided media?
A. Radio waves
B. Microwaves
C. Twisted pair
D. Infrared
Correct Answer:
C
Chapter: 102
Q1413:
What are the two broad types of transmission media?
A. Guided and directional
B. Guided and unguided
C. Unguided and optical
D. Guided and broadcast
Correct Answer:
B
Chapter: 102
Q1414:
Fill in the blank: Twisted pair, coaxial cable, and fiber optics are examples of ______ media.
A. unguided
B. wireless
C. guided
D. free-space
Correct Answer:
C
Chapter: 102
Q1415:
Unguided media transmit signals through ______.
A. Physical wires
B. Cables
C. Open space
D. Optical fibers
Correct Answer:
C
Chapter: 102
Q1416:
Which of the following is not a guided medium?
A. Twisted pair
B. Coaxial cable
C. Optical fiber
D. Microwave
Correct Answer:
D
Chapter: 102
Q1417:
Which layer does the transmission media fall under in the OSI model?
A. Application layer
B. Transport layer
C. Physical layer
D. Session layer
Correct Answer:
C
Chapter: 102
Q1418:
What is the function of guided media?
A. Transmit data using electromagnetic waves in air
B. Transmit data via physical paths
C. Compress data
D. Encrypt data
Correct Answer:
B
Chapter: 102
Q1419:
In guided media, signals propagate through ______.
A. Vacuum
B. Cables and wires
C. Satellites
D. Magnetic fields
Correct Answer:
B
Chapter: 102
Q1420:
Fill in the blank: In unguided media, data signals are transmitted through ______.
A. metallic wires
B. optical fibers
C. air and vacuum
D. twisted pair
Correct Answer:
C