A Level Computer Science: Introduction to Computer Networks
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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 is a computer network, and how does it function?
A computer network is a collection of interconnected devices, such as computers, servers, printers, and other peripherals, that communicate and share resources with each other. It functions by transmitting data in the form of data packets from one device to another, following a set of rules defined by protocols. This allows seamless information exchange and resource sharing within the network.
What are the main types of computer networks?
Computer networks can be broadly categorized into two main types: wired networks and wireless networks. Wired networks use physical cables, like Ethernet cables, to connect devices, while wireless networks utilize radio waves to establish connections, providing more flexibility and mobility.
What are the essential hardware components required for setting up a network?
To set up a computer network, several key hardware components are necessary. These include network adapters for each device to enable network connectivity, routers to direct data traffic and establish connections between different networks, switches to facilitate communication within a local network, and network cables for wired connections.
How are data packets used in computer networks?
When a file is sent over a network, it is broken down into smaller units called data packets. These packets contain a portion of the file's data along with addressing information, such as the source and destination addresses. They are transmitted individually from the sender to the receiver and reassembled in the correct order at the destination to reconstruct the original file.
What is the role of protocols in computer networks?
Protocols are a set of rules and conventions that govern the way data is transmitted and received over a network. They ensure that devices within the network can understand and interpret data consistently, enabling smooth communication. Some well-known protocols include TCP/IP (Transmission Control Protocol/Internet Protocol), which is fundamental for internet communication, and HTTP (Hypertext Transfer Protocol), which governs web page requests and responses.