Data Communication & Networking -Transmission Media MCQs SET-1
Q.1 How many types of Transmission Media are there in data communication?
1
2
3
None
Explanation
Transmission media are generally classified into two main categories: Guided (wired) and Unguided (wireless).
Q.2 Copper wire and Optical fiber are examples of which type of media?
Un-Guided Media
Guided Media
Microwave
None
Explanation
Guided media (or bounded media) use physical cables like copper or glass to direct signals along a specific path.
Q.3 Which of the following transmission media offers the highest data transmission speed in a network?
Coaxial cable
Twisted pair cable
Optical Fiber
None
Explanation
Optical fiber uses light pulses to transmit data, providing much higher bandwidth and speed compared to traditional copper cables.
Q.4 Which of the following is NOT classified as a transmission medium?
Coaxial cable
Modem
Optical Fiber
None
Explanation
A modem is a networking hardware device; cables like coaxial and fiber optic are the actual transmission media.
Q.5 Which of the following is an advantage of using fiber optic cables?
Low noise level
Fast data transmission
Both A & B
None
Explanation
Fiber optics provide extremely high-speed transmission and are immune to electromagnetic interference, resulting in very low signal noise.
Q.6 Copper wire is a primary example of?
Guided Media
Unguided Media
Microwave
None
Explanation
Guided media refers to physical conduits such as copper wires or glass fibers that channel the signal.
Q.7 In Fiber Optics, the signal is transmitted in the form of ________ waves?
Light
Wave
Infrared
None
Explanation
Fiber optic technology converts electrical signals into light pulses which travel through glass or plastic filaments.
Q.8 Which of the following is NOT a type of guided communication medium?
Coaxial Cable
Fiber optic cable
Twisted pair cable
Wood
Explanation
Wood is an insulator and cannot be used as a communication medium; the other three are standard wired media.
Q.9 Radio waves are characterized as being?
Single Direction
Omnidirectional
Bi-directional
Unidirectional
Explanation
Radio waves are omnidirectional, meaning they propagate in all directions from the source antenna.
Q.10 Which of the following are examples of Unguided (wireless) media?
Radio Waves
Microwaves
Both A & B
None
Explanation
Unguided media transmit electromagnetic waves without using a physical conductor; this includes radio, microwave, and infrared.
Q.11 What does the acronym VHF stand for in communication?
Very high Function
Very high Frequency
Very height Frequency
None
Explanation
VHF stands for Very High Frequency, a range of radio frequencies used for FM radio and television.
Q.12 A ________ is the physical path over which a communication message travels.
Medium
Protocol
Router
None
Explanation
The transmission medium is the physical link (wired or wireless) between the transmitter and the receiver.
Q.13 A set of rules that governs data communication between devices is known as a?
Medium
Protocol
Router
None
Explanation
Protocols are standard sets of rules that allow electronic devices to communicate and exchange data efficiently.
Q.14 Which was the first satellite launched by India?
SROSS-C
Arabsat
Aryabhata
None
Explanation
Aryabhata, launched in 1975, was India’s first satellite, named after the legendary Indian astronomer.
Q.15 Which type of cable is traditionally used for both voice and data communication (e.g., telephone lines)?
Coaxial Cable
Fiber optic
Twisted pair
All of the above
Explanation
Twisted pair cabling is the most common medium for telecommunication and local area networks (Ethernet).
Q.16 How many insulated conductors are twisted together in a standard twisted pair cable?
1 conductor
2 conductors
3 conductors
None
Explanation
A twisted pair consists of two separate insulated copper wires that are twisted together to reduce electromagnetic interference.
Q.17 Which kind of cable is specifically used for LAN/Internet connections (Ethernet)?
Optic fiber cable
Co-Axial Cable
Ethernet Cable
All of the above
Explanation
Ethernet cables (typically Category 5e or 6 twisted pair) are the standard for connecting computers to a local network.
Q.18 Which type of cable consists of a central copper conductor surrounded by an insulating layer and a metallic shield?
Optic fiber cable
Co-Axial Cable
Ethernet Cable
All of the above
Explanation
This describes the structure of a coaxial cable, which is commonly used for cable TV and high-frequency transmissions.
Q.19 Which cable is constructed with an inner copper core and a conducting outer sheath?
Optic fiber cable
Co-Axial Cable
Ethernet Cable
All of the above
Explanation
Coaxial cable uses two concentric conductors to carry signals with high immunity to external interference.
Q.20 Which component factor makes a coaxial cable less noisy than other copper cables?
Inner conductor
Diameter conductor
Outer conductor (Shield)
Central conductor
Explanation
The outer conductor, which acts as a shield, protects the signal from external electromagnetic noise and crosstalk.