Computer Science Concepts

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Modular Design

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A design where a system is broken into smaller, independent modules that can be individually replaced or upgraded.

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Cache Memory

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A small amount of very fast memory that stores frequently accessed data to speed up CPU access.

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Virtual Memory

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A technique where secondary storage (e.g., SSD) is used as if it were part of the main memory (RAM).

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Virtualisation

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Creating a virtual (rather than actual) version of something, like an OS or server, using software.

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Multitasking

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OS switches between programs.

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Multithreading

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A program runs multiple smaller processes at once.

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Multiprocessing

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A computer with multiple CPUs runs processes simultaneously.

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Bandwidth

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The maximum rate of data transfer across a network connection, measured in Mbps or Gbps.

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SSL/TLS

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Protocols for establishing authenticated and encrypted links between networked computers (the 's' in https).

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Digital Certificate

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An electronic 'passport' issued by a Certificate Authority (CA) to verify a website's identity.