cloud computing virtualisation
Overview
This lesson explores Cloud Computing and Virtualisation, two fundamental concepts revolutionising how computing resources are delivered and managed. We will delve into their definitions, underlying technologies, service models, deployment models, and the significant advantages and disadvantages they offer to individuals and organisations.
Introduction to Virtualisation
Virtualisation is the core technology underpinning cloud computing. It allows a single physical hardware resource, such as a server, to be divided into multiple isolated virtual environments, each behaving like an independent machine. This is achieved through a **hypervisor**, which acts as an inter...
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Key Concepts
- Virtualisation: The creation of a virtual (rather than actual) version of something, such as an operating system, a server, a storage device, or network resources.
- Cloud Computing: The on-demand delivery of computing services—including servers, storage, databases, networking, software, analytics, and intelligence—over the Internet ('the cloud') with pay-as-you-go pricing.
- Hypervisor: Software, firmware, or hardware that creates and runs virtual machines (VMs). Also known as a Virtual Machine Monitor (VMM).
- Infrastructure as a Service (IaaS): A cloud service model providing virtualised computing resources over the internet, including virtual machines, storage, networks, and operating systems.
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Exam Tips
- →Be able to clearly define Virtualisation and Cloud Computing, highlighting their relationship.
- →Memorise the three main Cloud Service Models (IaaS, PaaS, SaaS) and be able to provide a real-world example for each, explaining the level of user responsibility.
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