Computer Knowledge
Computer Networks
2,095 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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In dynamic channel allocation, stations first checks whether the channel is busy or not.
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In dynamic channel allocation, stations can not sense the channel before trying to use it.
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CSMA/CD systems use 1-persistent CSMA including Ethernet.
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All of the above
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Both (1) and (3)
E
Correct answer
Explanation
These are the true statements.
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In Ring topology, if a device fails then the entire network will fall.
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Ring topology can be used in school buildings.
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In Ring topology devices typically connect to the hub with Unshielded Twisted Pair (UTP).
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Star topology uses a router for connecting devices.
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In Ring topology, all messages travel through a ring in the same direction.
C
Correct answer
Explanation
Ring topology does not use Unshielded Twisted Pair (UTP) for connecting devices.
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There is no state information necessary for VC subnet.
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In VC subnet, the routing can be done independently.
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Congestion control is very much difficult in VC subnet.
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All of the above
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Only (1) and (2)
E
Correct answer
Explanation
Option (3) is also false.
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These networks share a single communication channel.
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LANs (Local Area Networks) work as a Broadcast network.
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In Broadcast networks, the pair of routers are directly connected.
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Broadcast networks are used in Data Link Layer.
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None of the above
C
Correct answer
Explanation
This is false as the direct networking point apply for Point to Point networks. Broadcast networks can operate from multipoint channel.
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router
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modem
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switch
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UPS
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jack panel
A
Correct answer
Explanation
Router is a device to connect two different networks LAN and the Internet. Routers connect networks. A router links computers to the Internet, so users can share the connection.
(Source:Basics of Computer Networking and setting up of LAN - unit 5- A publication of International Telecommunicaion Union)
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Broadcast linking
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Narrowcast linking
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Point to point linking
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None of these
B
Correct answer
Explanation
Broadcast and point-to-point are standard, well-documented transmission technologies used in networking. 'Narrowcast linking' is not a recognized transmission technology in networking literature or practice.
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Interactive multi-media
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Network multi-media
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MPEG video
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All the above
B
Correct answer
Explanation
Client-server architecture is fundamental to network multimedia applications where content servers deliver audio/video to multiple client devices simultaneously. Interactive multimedia (option A) can run standalone on a single machine without requiring a client-server model. MPEG (option C) is a video compression format standard, not a use case or application type.
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Remote Concentrator
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Message switcher
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Front and processor
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Demux
A
Correct answer
Explanation
A Remote Concentrator aggregates data from multiple low-speed devices (like terminals) and transmits it over high-speed communication lines to different locations, optimizing bandwidth and reducing transmission costs.
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attenuation and amplification
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dynamic equalisation
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automatic dial-up
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All of the above
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Local Area Network
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Metropoliton Area Network
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Wide Area Network
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Personal Area Network
A
Correct answer
Explanation
Local Area Network is privately owned network within a single building or campus of up to few kilometers in size.
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10 Km
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1000 Km
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10 m - 1Km
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1 m
C
Correct answer
Explanation
This is the range of Local Area Network.
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Physical layer
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Data link layer
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Network layer
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None of these
C
Correct answer
Explanation
The network layer provides the functional and procedural means of transferring variable length data sequences from a source to a destination via one or more network.
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Simplex
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Half duplex
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Full duplex
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Multi duplex
B
Correct answer
Explanation
Half duplex refers to two-way communication but in only one direction at a time.
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Parallel transmission
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Simplex
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Synchronous transmission
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Asynchronous transmission
C
Correct answer
Explanation
Synchronous transmission is a type of communication in which communicating parties are live or present in the same space and time.
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Bus topology
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Ring topology
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Star topology
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Tree topology
C
Correct answer
Explanation
Star topology is designed with each node connected directly to a central network hub.