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Cloud Computing
Back
Delivery of computing services over the internet
Includes servers, storage, databases, and networking on a pay-as-you-go basis.
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Azure Fundamentals (AZ-900) - 50 Key Concepts
Prepare for the AZ-900 exam with 50 flashcards covering Azure cloud concepts, services, security, and pricing.
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High Availability
Back
Ensuring a service remains accessible with minimal downtime
Focuses on system uptime and availability even if a component fails.
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Vertical Scaling (Scaling Up)
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Adding more power (CPU, RAM) to an existing resource
Increasing the capacity of a single Virtual Machine.
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Horizontal Scaling (Scaling Out)
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Adding more instances of a resource
Adding more Virtual Machines to a cluster to handle increased load.
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Elasticity
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The ability to automatically scale resources to match demand
Resources are added during peaks and removed during troughs to save costs.
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Agility
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The speed at which IT resources can be allocated or changed
Allows businesses to respond quickly to market changes and deploy apps fast.
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Fault Tolerance
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The ability of a system to continue operating despite failures
Uses redundancy to ensure zero downtime during hardware or software issues.
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Capital Expenditure (CapEx)
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Upfront spending on physical infrastructure
Costs are deducted over time (depreciation) and require high initial investment.
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Operational Expenditure (OpEx)
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Spending money on services or products as they are used
No upfront cost; expenses are deducted in the same tax year (Pay-as-you-go).
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Shared Responsibility Model
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Division of security tasks between Azure and the customer
Azure manages the physical cloud; the customer manages data and identities.
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