Computer Knowledge
Computer Networks
2,256 Questions
Computer networks form the backbone of digital communication, connecting multiple devices to share data and resources. This area covers network architectures, transmission media, modems, and topologies like LAN. These concepts are crucial for computer knowledge sections in banking and government exams.
Network topologiesModulation and demodulationNetwork addressingFiber optic cablesWireless infrastructure
Computer Networks Questions
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300 bits per second
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1200 bits per second
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2400 bits per second
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none of the above
A
Correct answer
Explanation
Historically, the earliest and cheapest modems operated at 300 bits per second (bps).
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a packet
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a modem
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an emulator
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none of the above
B
Correct answer
Explanation
A modem (modulator-demodulator) is the device specifically designed to convert digital signals to analog and vice versa.
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twisted-pair cables
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co-axial cables
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fiber optic cables
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microwaves
A
Correct answer
Explanation
Among the options provided, twisted-pair cables generally have lower bandwidth and slower transmission speeds compared to coaxial, fiber optic, or microwave links.
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bus networks
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ring network
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star network
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t-switch network
A
Correct answer
Explanation
Bus networks are often cited for their flexibility in adding or removing devices without disrupting the entire network, though star networks are more common today.
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Bus network
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Ring network
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Star network
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T-switch network
D
Correct answer
Explanation
A T-switch (or manual switch) is a device that requires manual, human intervention to route signals between different ports or devices.
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file server
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utility server
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printer server
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gateway
D
Correct answer
Explanation
A gateway is a network node that connects two networks using different protocols. It acts as an entry and exit point for traffic moving between distinct networks.
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control how messages are passed between computers
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echo every character that is received
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transmits characters one at a time
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rearrange the connections between computing equipments
D
Correct answer
Explanation
A T-switch (or terminal switch) is a hardware device used to manually or electronically switch connections between different computing devices, such as sharing a printer or terminal between multiple computers.
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T-switch
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Modem
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Frequency-division multiplexer
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Time-division multiplexer
C
Correct answer
Explanation
Frequency-division multiplexing (FDM) works by dividing the available bandwidth into multiple frequency bands, each carrying a separate signal.
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a co-axial cable
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a dedicated line
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a ground station
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all of the above
A
Correct answer
Explanation
Coaxial cable is a common medium for connecting devices within a local area, such as a single room or building, due to its shielding and bandwidth capabilities.
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simplex
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duplex
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half duplex
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multiplex
C
Correct answer
Explanation
Half-duplex communication allows data to flow in both directions, but only one direction at a time, similar to a walkie-talkie.
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Multiplexer
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Gateway
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T-switch
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Modem
B
Correct answer
Explanation
A gateway is specifically designed to connect two different networks, allowing them to exchange data despite differences in protocols or architecture.
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simplex
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half duplex
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duplex
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multiplex
C
Correct answer
Explanation
Full-duplex (often just called duplex) communication allows data to be transmitted and received simultaneously.
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bus network
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star network
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duplex
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multiplex
B
Correct answer
Explanation
In a star network topology, all nodes are connected to a central hub or switch, through which all data must pass.
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line
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remote computer
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modem
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file transfer
A
Correct answer
Explanation
A communication line is the physical or logical path that carries information between two points.
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Switch network
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Circuit switching
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Packet switching
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None of the above
B
Correct answer
Explanation
Circuit switching establishes a dedicated physical path between two stations for the duration of the communication session.