nexus/wiki/entities/cloud-computing.md

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Cloud Computing

Cloud Computing

Cloud Computing is the delivery of computing services—including servers, storage, databases, networking, software, analytics, and intelligence—over the Internet ("the cloud") to offer faster innovation, flexible resources, and economies of scale.

Key Characteristics

• On-demand self-service: Provision resources as needed without human intervention
• Broad network access: Access via internet from anywhere on any device
• Resource pooling: Multi-tenant model with resources pooled to serve multiple consumers
• Rapid elasticity: Scale resources up or down dynamically
• Measured service: Pay-as-you-go pricing model

Common Misconceptions

Cloud computing is widely misunderstood. Key myths include:

1. Cloud is not secure — Reality: Major providers invest heavily in security (encryption, MFA, ISO 27001, HIPAA, GDPR compliance) and offer 24/7 monitoring
2. Cloud is "someone else's computer" — Reality: Cloud is a vast network of sophisticated data centers with redundancy, auto-failover, and global distribution
3. Cloud is too expensive — Reality: Pay-as-you-go, reserved instances, auto-scaling, and serverless models can significantly reduce costs vs. on-premises
4. You lose control over data — Reality: Cloud providers offer robust data governance, permissions management, and hybrid/multi-cloud options
5. Only for large enterprises — Reality: SMBs and startups benefit greatly from flexible pricing and enterprise-grade technology
6. Migration is too complex — Reality: Phased migration, hybrid cloud, and professional services enable smooth transitions
7. Performance is unreliable — Reality: Major providers offer SLAs exceeding 99.99% uptime with redundant infrastructure and automated failover

Cloud Deployment Models

• Public Cloud: Resources shared across multiple organizations (AWS, Azure, GCP)
• Private Cloud: Dedicated to a single organization (on-premises or hosted)
• Hybrid Cloud: Combines public and private clouds
• Multi-Cloud: Uses multiple public cloud providers simultaneously

Related Concepts

Cloud Providers

In multi-cloud strategies, organizations typically work with multiple providers:

• AWS — Amazon Web Services
• Azure — Microsoft Azure
• Google-Cloud — Google Cloud Platform

Related Concepts

• Cloud Security
• Cloud Migration
• High Availability
• Multi-Cloud Strategy
• Vendor-Lock-In
• Data-Sovereignty
• FinOps
• Infrastructure as Code
• Serverless Computing

Sources

• The Myths and Misconceptions About Cloud Computing (LinkedIn)
• How Can a Multi Cloud Strategy Transform Your Business ROI