What is cloud computing and how does it work?
Definition and Concept
- Cloud computing is the delivery of computing services—such as servers, storage, databases, networking, and software—over the internet.
- It allows users to access data and applications from any location with an internet connection.
- Services are hosted by third-party providers and offered on-demand.
- Resources are allocated virtually, eliminating the need for physical hardware.
- Users pay only for what they use, which adds flexibility and cost control.
Deployment Models
- Public cloud offers shared resources through providers like AWS, Azure, or Google Cloud.
- Private cloud is hosted on-premise or by a single organization for more control.
- Hybrid cloud combines both public and private for balanced performance and security.
- Community cloud serves multiple organizations with similar needs.
- Multi-cloud uses several cloud providers to avoid dependency on one platform.
Service Models
- Infrastructure as a Service (IaaS) provides virtual machines and storage.
- Platform as a Service (PaaS) offers environments to develop and deploy applications.
- Software as a Service (SaaS) delivers software applications via browser or app.
- Backend as a Service (BaaS) handles server-side logic and database management.
- Function as a Service (FaaS) supports event-driven, serverless computing.
Key Technologies
- Virtualization allows efficient sharing of computing resources.
- APIs help integrate cloud services with other tools or systems.
- Load balancing distributes workloads across servers.
- Data redundancy ensures high availability and disaster recovery.
- Monitoring tools provide real-time performance and usage analytics.
Usage and Access
- Users connect to cloud platforms through secure web interfaces or apps.
- Admins manage services via dashboards or command-line tools.
- Billing and usage are tracked automatically based on consumption.
- Cloud platforms offer automated scaling and resource provisioning.
- Security protocols like encryption and access controls are built in.