Cloud Computing

Definition

Cloud Computing: Refers to data and applications being stored and run on the cloud instead of local computers.
Accessed through the internet.

Cloud: A large building filled with servers (computers providing services).
Contains data centers with numerous servers performing various tasks:
- Running applications
- Storing data
- Data processing
- Web hosting

Cloud Providers: Companies that own the cloud and sell computing services.
Outsourcing computing workload to reduce personal responsibility for maintenance and issues.

Traditional Email Setup: Requires own physical email server and maintenance.
Cloud Email Services: Services like Gmail or Hotmail host emails on the cloud, eliminating the need for personal server maintenance.

Cost Efficiency: Reduces expenses of hardware, software, and maintenance.
Reliability: Cloud providers handle data backup and disaster recovery; redundant sites ensure no downtime.
Scalability: 'Pay as you go' model allows flexibility in the number of rented computers based on business needs.

Amazon Web Services (AWS): Largest provider, with a significant market share (1/3). Example: Netflix uses AWS for various computing needs.
Other providers include: Microsoft Azure, Google Cloud Platform, Alibaba, IBM.

Infrastructure as a Service (IaaS):
- Cloud provider manages hardware (servers, storage, virtualization, networking).
- User manages software (applications, data, operating systems).
- Examples: iDrive, Carbonite.
Platform as a Service (PaaS):
- Provider manages hardware and operating system, middleware, and runtime.
- User responsible for applications and data.
Software as a Service (SaaS):
- Provider hosts all applications; no software installation needed.
- Example: Google Docs - accessed via web browser with no additional installations required.

Cloud computing simplifies computing tasks, reduces costs, and offers flexibility for individuals and businesses.
Encouragement to subscribe for more information.