FBISE, NCP & NBF-aligned resources for Classes 9–12
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Computer Chapter 1 : Topic 3.1
Data Communication Basics
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A computer sends a large file over a network where the data is broken into smaller units before transmission; which transmission method is being used?
Reasoning: Packet switching divides data into packets that are sent independently across the network.
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In a communication system, a dedicated path is established between sender and receiver before data transfer begins; which method is this?
Reasoning: Circuit switching creates a fixed communication path for the entire session.
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Why is packet switching generally more efficient than circuit switching in modern networks?
Reasoning: Packet switching allows dynamic sharing of network resources, improving efficiency.
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What happens to data in packet switching before it reaches the destination?
Reasoning: Packets can travel through different routes and are reassembled at the destination.
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In networking, which term describes dividing communication into different functional levels such as application, transport, and network layers?
Reasoning: Layering organizes network communication into hierarchical levels for better management.
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What is the main purpose of layering in network communication?
Reasoning: Layering breaks complex communication into structured functions.
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When data is sent from one computer to another, it passes through multiple layers; what is this process called?
Reasoning: Encapsulation is the process of adding headers as data moves through layers.
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During encapsulation, what is added to data at each network layer?
Reasoning: Each layer adds control information to help deliver the data correctly.
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What is the correct order of data processing when it leaves a sender in a layered model?
Reasoning: Data is encapsulated at the sender, transmitted, then decapsulated at the receiver.
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At the receiving computer, what happens to the headers added during encapsulation?
Reasoning: Each layer removes its corresponding header during decapsulation.
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Which layer-based approach improves troubleshooting in networks?
Reasoning: Layering isolates functions, making it easier to identify and fix problems.
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