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
B
Correct answer
Explanation
Yes, data is in the form of bursts.
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Gateway
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Repeater
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Router
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Modem
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LAN
D
Correct answer
Explanation
A modem is a combined device for modulation and demodulation.
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WWW
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Internet
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Extranet
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Usenet
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Telnet
C
Correct answer
Explanation
An extranet is a computer network that allows controlled access from the outside. An extranet is a private network that uses internet technology and the public telecommunication system to securely share part of a business's information.
D
Correct answer
Explanation
WAP (Wireless Application Protocol) is a specification for a set of communication protocols to standardize the way that wireless devices, such as cellular telephones and radio transceivers, can be used for Internet access, including e-mail, the World Wide Web, newsgroups, and instant messaging.
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n - 1, n (n - 1)/2
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n, n - 1
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n - 1, n
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n (n - 1)/2, n - 1
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n, n + 1
D
Correct answer
Explanation
For a mesh ,it is a case of complete graph with n verticeshence links=n(n-1)/2 For star n-1 links are needed since a single central host is connected to all host.
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CAT 5
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CAT 6
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Coaxial cable
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Only 1 and 2
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1, 2 and 3
D
Correct answer
Explanation
Both cable is frequently used for LAN cabling.
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Physical Layer
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Data Link Layer
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Network Layer
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Transport Layer
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Application Layer
B
Correct answer
Explanation
Responsible for moving frames from hop to hop and multiplexing is performed in this layer.
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ISDN primary rate interface
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ISDN basic rate interface
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Interface
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Address
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Node
A
Correct answer
Explanation
It can support many concurrent B-channel links and one 64 kbps D-channel.
C
Correct answer
Explanation
WAN stands for Wide Area Network. This is the correct answer.
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Single transfer mode
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Block transfer mode
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Demand transfer mode
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Transfer rate
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Unit of transfer
A
Correct answer
Explanation
It requires the DMA controller to arbitrate for the system bus with each transfer.
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bus network
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ring network
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star network
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both 1 and 2
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both 2 and 3
C
Correct answer
Explanation
A star topology is designed with each node connected directly to a central node. If the central node in the star network fails, the entire network is disabled.
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Travel booking system
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World Wide Web
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ATM banking system
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All of the above
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Only (1) and (2)
D
Correct answer
Explanation
Yes, all the above three are the examples of WAN.
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gateways
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mail gateways
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bridges
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user agent
B
Correct answer
Explanation
A mail gateway is a specialized software that connects different email systems and transfers messages between them. Unlike generic gateways, mail gateways handle email-specific protocols (SMTP, POP, IMAP) and format conversions. Bridges connect network segments, while user agents are email clients (like Outlook or Gmail) used by individuals. Mail gateways ensure interoperability between heterogeneous email systems.
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Routers to strengthen the attenuated signals
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Repeaters to establish physical connection between various LANs
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Gateways to allow a network to use the resources of another main frame
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Bridges to optimize the transmission path of massages
C
Correct answer
Explanation
Gateways allow networks to access resources of other systems, including mainframes. They translate between different protocols and architectures. Routers direct traffic (not primarily for signal strengthening), repeaters amplify signals (not for LAN connections), and bridges connect network segments (not for optimizing message paths). Gateways enable interoperability between dissimilar networks and systems like mainframes.
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Cable
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DSL
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Dial-up
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Satellite
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None of these
C
Correct answer
Explanation
Dial-up is not a type of broadband internet connection.