MCQ on Communications and Networks – Computer GK
Useful and informative MCQ on Communications and Networks – Computer GK that include topics like Communication System, Data Transmission Modes, Data Transmission Speed, Data Transmission Media, Switching Techniques, Routing Techniques, Network Topologies, Network Types, Communication Protocols, Wireless Networks, Internetworking Tools, etc.
These MCQ on Communications and Networks – Computer GK are very helpful for competitive exams such as CPCT, GATE, IES/ESE, IBPS PO, IBPS Clerk, SBI PO, SBI Clerk, RBI, SEBI, LIC, NICL, BCA, B.Sc. IT, DCA, SSC, RRB, NIELIT CCC, CTET, UDC NET, CUET, MCA, PGDCA, MCS, TET, State Police, BPO, etc.
These MCQ on Communications and Networks – Computer GK have correct answers and brief explanations of each question for better understanding.
Q21. Which of the following is a type of data transmission mode that allows communication in only one direction?
a) Simplex
b) Half-duplex
c) Full-duplex
d) Asynchronous
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Correct Answer: a) Simplex
Explanation: Simplex transmission mode allows communication in only one direction. In simplex communication, data can be transmitted from the sender to the receiver, but not in the reverse direction. Examples of simplex communication systems include radio and television broadcasting, where the transmitter sends signals to multiple receivers, but the receivers cannot send signals back to the transmitter.
Q22. Which of the following is a type of data transmission media that uses electromagnetic waves to transmit data through the air or space?
a) Twisted pair
b) Coaxial cable
c) Optical fiber
d) Microwave
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Correct Answer: d) Microwave
Explanation: Microwave is a type of data transmission media that uses electromagnetic waves to transmit data through the air or space. Microwaves are a form of radio waves with higher frequencies and shorter wavelengths, which allows them to carry more data and travel longer distances with less signal loss. Microwave communication systems can be used for point-to-point data transmission, such as between two buildings, or for satellite communication, where signals are transmitted between a ground station and a satellite in orbit.
Q23. Which of the following is a type of data transmission media that uses light waves to transmit data through the air or space?
a) Twisted pair
b) Coaxial cable
c) Optical fiber
d) Infrared
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Correct Answer: d) Infrared
Explanation: Infrared is a type of data transmission media that uses light waves to transmit data through the air or space. Infrared communication systems use light waves in the infrared spectrum, which is just below the visible light spectrum. Infrared communication is commonly used in short-range wireless communication systems, such as remote controls for televisions and other electronic devices.
Q24. Which of the following is a type of data transmission media that uses electrical signals to transmit data over a conductor?
a) Twisted pair
b) Coaxial cable
c) Optical fiber
d) Radio waves
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Correct Answer: a) Twisted pair
Explanation: Twisted pair is a type of data transmission media that uses electrical signals to transmit data over a conductor. A twisted pair consists of two insulated copper wires arranged in a regular spiral pattern. The twisting helps to reduce noise and interference from external sources. Twisted pair cables are commonly used in telephone lines and local area networks (LANs).
Q25. Which of the following is a type of data transmission media that uses a central conductor surrounded by an insulating material and a metallic shield?
a) Twisted pair
b) Coaxial cable
c) Optical fiber
d) Radio waves
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Correct Answer: b) Coaxial cable
Explanation: Coaxial cable is a type of data transmission media that uses a central conductor surrounded by an insulating material and a metallic shield. The central conductor carries the data signal, while the metallic shield provides protection against electromagnetic interference (EMI) and radio frequency interference (RFI). Coaxial cables are commonly used in cable television systems, broadband internet connections, and some local area networks (LANs).