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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Due to weak signals
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Due to long distance travelled by signals
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Due to traffic
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None of the above
B
Correct answer
Explanation
Satellite communication suffers from propagation delays due to large distance travelled by signals.
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Full Duplex
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Simplex
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Half Duplex
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None of the above
B
Correct answer
Explanation
In above condition only simplex is involved, i.e. only in one direction.
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Huge delay in propagation
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Lot of congestion
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Loss of packet
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None of the above
A
Correct answer
Explanation
Satellite communication suffers from propagation delay due to large distance travelled by the signals.
B
Correct answer
Explanation
D channel is the lowest data rate because it is used for signaling with 16 kbps.
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Electronic (Telecommunication)
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Asynchronous
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Synchronous
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Both (2) and (3)
D
Correct answer
Explanation
Synchronous and asynchronous are communication techniques.
B
Correct answer
Explanation
FDDI ring uses two fiber rings, one transmits clockwise and other counter clockwise, if one breaks up other uses as backup.
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802.11a
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802.11b
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802.11c
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802.11e
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802.11f
C
Correct answer
Explanation
This standard of IEEE is supplementary to the MAC layer in 802.11 to promote world wide use of IEEE 802.11 WLAN.
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Mobile switching center
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Base station subsystem
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Base station controller
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Radio base station
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PSTN
B
Correct answer
Explanation
This functional entity of a GSM network contains the necessary hardware and software to enable and control the radio links with the mobile stations.
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communication systems
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computer systems
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open systems
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none of these
C
Correct answer
Explanation
Systems that are designed to communicate with other systems based on standard protocols are known as open systems.
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primitives
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symbols
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data types
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none of these
A
Correct answer
Explanation
A service definition is formally described by the set of primitives that the service provider makes available to the service user.
B
Correct answer
Explanation
A Wide Area Network (WAN) is designed to cover large geographical distances, connecting institutions across regions, nations, or the globe. Other options like MAN cover cities, and VAN is a less standard term in this context.
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modulator-demodulator
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external memory
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output device
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all of the above
A
Correct answer
Explanation
The term 'modem' is a portmanteau derived from the words modulator and demodulator, which describe its function of converting digital signals to analog and vice versa.
A
Correct answer
Explanation
A modem is the specific hardware device that modulates and demodulates signals to allow computers to communicate over analog telephone lines.
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parallel
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series parallel
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direct
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serial
D
Correct answer
Explanation
In computer communication, data is typically transmitted one bit at a time over a single channel, which is known as serial communication.
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Cable
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Computer
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Printer
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Modem
D
Correct answer
Explanation
While modems are used for connecting to WANs or the internet, a Local Area Network (LAN) typically uses network interface cards, switches, and cables to connect computers and printers directly, without needing a modem.