Cloud Computing ICT

Cloud computing

Cloud computing refers to the delivery of computing services such as storage, processing, and software over the internet, rather than from a local server or personal computer.

These services are provided by cloud providers like Amazon Web Services (AWS), Microsoft Azure, Google Cloud, and others.

Cloud computing enables users and businesses to access resources and applications on-demand, typically via a pay-as-you-go model, without the need to invest heavily in physical infrastructure.

Cloud Service Models

The cloud service model determines the level of control, flexibility, and management a customer has over the cloud resources. There are three main service models.

Infrastructure as a Service (IaaS)

IaaS Provides virtualized computing resources (such as virtual machines, storage, and networking) over the internet.
Examples are AWS EC2, Google Compute Engine, Microsoft Azure.
Businesses need basic computing infrastructure without managing physical hardware.
The Advantages are High flexibility, scalability, and low initial costs.
Responsibilities of Customers are need to Managing operating systems, applications, and data.

Platform as a Service (PaaS)

PaaS Offers a platform that allows developers to build, deploy, and manage applications without worrying about the underlying hardware or software layers.
Examples are Google App Engine, Microsoft Azure App Service, Heroku.
It is moslly used for Web development, software deployment, and testing.
Advantages are Business Focuses on app development rather than infrastructure.
Responsibility of the customers are Application code, data, and configurations.

Software as a Service (SaaS)

SaaS Delivers software applications over the internet, on a subscription basis, without the need for users to install or maintain them.
Examples are Google Workspace (Gmail, Google Docs), Microsoft 365, Dropbox.
It is mostly used for Productivity software, CRM systems, email, and collaboration tools.
Advantages are No need software installation, automatic updates, and accessible from any device.
Responsibilities of the customers are User settings and data.

Key Benefits of Cloud Computing

1. Cost Efficiency: No upfront investment in physical infrastructure. Users pay only for what they use.
2. Scalability: Cloud resources can be scaled up or down based on demand, ensuring efficient use of resources.
3. Accessibility: Cloud services can be accessed from anywhere with an internet connection, enabling remote work and collaboration.
4. Disaster Recovery: Cloud-based backups and redundancy help protect against data loss and system failures.
5. Security: Many cloud providers offer robust security features such as encryption, multi-factor authentication, and regular security updates.
6. Collaboration: Tools hosted on the cloud can be accessed and edited by multiple users in real-time.