5.4 Cloud Computing

This topic introduces Cloud Computing, explaining what it is, how it works, and the three main types: Public Cloud, Private Cloud, and Hybrid Cloud.

Definition

Cloud Computing: Cloud Computing refers to delivery of computing services over the Internet by cloud computing vendors. These services include servers, storage, databases, networking, software, etc. Cloud computing enables businesses and organizations to access databases and cloud applications over the Internet from remote physical servers. It is an alternative to in-house data processing. The Internet becomes the cloud, and users can access and process the data with any device that can connect to the Internet anywhere in the world.

Core Concept

Cloud computing is like using electricity from the grid instead of generating your own power. Just as you don't need to build a power plant to have electricity at home, you don't need to buy and maintain your own servers to use computing services. You simply connect to the cloud (the Internet) and use the services you need—storage, software, databases—paying only for what you use. The cloud provider manages the infrastructure, so you can focus on your work. This is why cloud computing is often described as "utility computing"—it's like a utility service (electricity, water) for IT resources.

Detailed Explanation

What is Cloud Computing?

Cloud Computing refers to delivery of computing services over the Internet by cloud computing vendors. These services include servers, storage, databases, networking, software, etc.

• Delivery of computing services over the Internet.
• Services include servers, storage, databases, networking, software.
• Alternative to in-house data processing.
• The Internet becomes the cloud.
• Users can access data from any device, anywhere.
• Pay-as-you-go model (typically).

Analogy: Cloud computing is like renting a car instead of buying one. You get the vehicle you need, when you need it, without the cost of ownership, maintenance, or parking.

How Cloud Computing Works

Cloud computing enables businesses and organizations to access databases and cloud applications over the Internet from remote physical servers. It is an alternative to in-house data processing. The Internet becomes the cloud, and users can access and process the data with any device that can connect to the Internet anywhere in the world.

• Access services over the Internet.
• Remote physical servers host the services.
• Alternative to in-house data processing.
• Access from any device, anywhere.
• No need for local infrastructure.