FBISE, NCP & NBF-aligned resources for Classes 9–12
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Computer Chapter 1 : Topic 3.2
Network Topologies & Modes
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In a computer network, which topology connects all devices through a single central device such as a hub or switch?
Reasoning: In a star topology, all devices are connected to a central node which controls communication.
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Which network topology allows every device to be directly connected to every other device in the network?
Reasoning: Mesh topology provides multiple direct connections between all nodes, increasing reliability.
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In which topology do all devices share a single communication line, making data travel in both directions along the same cable?
Reasoning: Bus topology uses a single backbone cable shared by all devices.
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Which topology arranges devices in a circular manner where each device is connected to exactly two neighboring devices?
Reasoning: In ring topology, data travels in a loop between devices.
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Which network topology is most suitable when a company needs maximum reliability and multiple redundant paths?
Reasoning: Mesh topology provides redundancy through multiple paths between nodes.
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In a star network, what is the major disadvantage if the central hub or switch fails completely?
Reasoning: Failure of central device stops communication in the entire star network.
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Which topology is often considered the easiest to install but becomes inefficient as more devices are added?
Reasoning: Bus topology is simple but performance degrades with heavy traffic.
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In which topology is data passed in a circular direction, and a single break in the cable can disrupt the entire network?
Reasoning: Ring topology is sensitive to breaks in the loop.
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Which topology combines characteristics of both star and bus topologies in a hierarchical structure?
Reasoning: Tree topology is a structured extension of star and bus networks.
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Which transmission mode allows data to flow in only one direction without any return communication?
Reasoning: Simplex mode supports one-way communication only.
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Which transmission mode allows data to be sent and received but not at the same time?
Reasoning: Half duplex allows two-way communication but not simultaneously.
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Which transmission mode enables both devices to send and receive data at the same time without waiting?
Reasoning: Full duplex supports simultaneous two-way communication.
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Which real-life communication system is the best example of simplex transmission mode?
Reasoning: TV broadcasting is one-way communication from sender to viewers.
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A walkie-talkie system operates in which type of transmission mode where users take turns speaking?
Reasoning: Walkie-talkies allow only one side to transmit at a time.
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Which network topology is most affected by a large amount of data traffic on the main communication line?
Reasoning: Bus topology slows down when too many devices use the shared cable.
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In which topology does each device require exactly two network connections to maintain communication flow?
Reasoning: Each node in a ring connects to two neighbors only.
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Which topology is commonly used in large organizations due to its scalability and structured layout?
Reasoning: Tree topology supports hierarchical expansion in large networks.
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What happens in a mesh topology when one connection between two devices fails in a large network?
Reasoning: Mesh topology provides alternative routes for communication.
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Which transmission mode is commonly used in modern internet communication systems for high-speed two-way data exchange?
Reasoning: Full duplex enables simultaneous data exchange, ideal for internet communication.
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In a star topology, what is the role of the central hub or switch in controlling communication flow between devices?
Reasoning: The hub/switch manages and forwards data between connected devices.
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Which topology provides the highest level of fault tolerance due to multiple alternative communication paths?
Reasoning: Mesh topology ensures communication even if one path fails.
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Which network topology becomes more expensive and complex as the number of connected devices increases significantly?
Reasoning: Mesh requires many cables and connections, increasing cost and complexity.
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