GCSE Computer Science: Network Protocols and Layers
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All Computer Science topics are covered, and each module comes complete with:
Classroom Presentations
Revision Notes
Activities & Quizzes
Mind Maps, Flashcards & Glossaries
Frequently Asked Questions
What are network protocols?
Network protocols are a set of rules that define how data is transmitted and received over a network. These protocols ensure that data is sent and received in a consistent and reliable manner, regardless of the type of devices or networks involved.
What is the OSI model?
The OSI (Open Systems Interconnection) model is a seven-layer model that is used to describe how data is transmitted over a network. Each layer provides a specific set of services to the layer above it, and communicates with the layer below it using standardized protocols.
What is the purpose of the physical layer?
The physical layer is responsible for transmitting raw bits over a physical medium, such as copper wire or fiber optic cables. It defines the electrical, mechanical, and procedural specifications for transmitting data over a physical connection.
What is the transport layer?
The transport layer is responsible for ensuring that data is reliably delivered between devices. It manages flow control, error detection, and retransmission of lost or corrupted data. The transport layer is also responsible for providing end-to-end data delivery services.
Why is a layered approach to networking important?
A layered approach to networking, such as the OSI (Open Systems Interconnection) model or the TCP/IP (Transmission Control Protocol/Internet Protocol) model, is important because it provides a standardized way of organizing the different functions and processes involved in networking.