CHAPTER-4 cloud computing and iot CT

 Cloud Computing means using computer resources (like storage, servers, databases, networking, software, and applications) over the Internet instead of keeping them on your own computer or office servers.

 Simply, you don’t need to buy expensive hardware or servers. You can use services from the Cloud (like Google Cloud, AWS, Microsoft Azure) whenever you need.

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### Key Features of Cloud Computing:

1. On-demand service → Available anytime when needed.

2. Scalability → Can increase or decrease resources as per requirement.

3. Cost-effective → Saves hardware and maintenance costs.

4. Accessibility → Can be accessed from anywhere with the Internet.

5. Security & Backup→ Data is secured and backed up.

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 Types of Cloud Services:

1. IaaS (Infrastructure as a Service) → Provides servers, storage, networking (e.g., Amazon AWS, Google Compute Engine).

2. PaaS (Platform as a Service) → Provides a platform for developers to build applications (e.g., Google App Engine, Microsoft Azure).

3. SaaS (Software as a Service) → Ready-made software used through the Internet (e.g., Gmail, Google Drive, Microsoft 365, Zoom).

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Cloud Deployment Models:

1. Public Cloud → Open for everyone (e.g., Google Drive, Dropbox).

2. Private Cloud → Dedicated to a single organization.

3. Hybrid Cloud → Combination of public and private cloud.

In short: Cloud Computing is a technology that delivers computer services through the Internet without needing physical hardware at your place.