Cloud Computing 🌟

🖥️ Hardware : Hardware consist if the Computer itself. and it includes a central processing unit (CPU), memory modules, storage drives, input devices (e.g., keyboard, mouse), output devices (e.g., monitor, printer), and any equipment connected to it .

💾 Software Basics 💻

1. Definition: Software is a set of instructions that the computer follow performing tasks.

2. Types of Software:

   • Application Software: Programs designed to perform specific tasks for users, like word processors or web browsers.

     • Microsoft Office Suite 📊

     • Google Chrome 🌐

     • Zoom 📹

   • System Software: It is also called as Client Operating systems

     • Operating Systems like Windows, macOS, Linux 🖥️

     • Mobile OS like Android, iOS 📱

Operating System (OS) 🖥️

operating system (OS) is a system software or Collection of program with provides an env to run other application.

Types of Operating Systems:

1. 1. Desktop Operating Systems:

      • Examples: Windows, macOS, Linux.

      2. Mobile Operating Systems:

         • Examples: Android, iOS.

      3. Server Operating Systems:

         • Examples: Windows Server, Linux Server (e.g., Ubuntu Server, CentOS).

      4. Embedded Operating Systems:

         • Examples: Embedded Linux, Windows Embedded, RTOS (Real-Time Operating Systems).

What is Cloud? ☁️ network/internet

It is a Something will be Present on remote Location

What is Cloud Computing? 🌐

• Cloud computing is the delivery of computing services—including servers, storage, databases, networking, software, and more—over the internet.

Characteristics of Cloud Computing 🌟

1. On-Demand Self-Service: Users can Access computing resources any time any ware

2. Broad Network Access: Cloud services are accessible over the internet various devices such as laptops, smartphones, and tablets.

3. Resource Pooling: Computing resources are pooled to serve multiple users, with different physical and virtual resources dynamically assigned and reassigned according to demand.

4. Rapid Elasticity: Resources can be scaled up or down quickly and easily

5. Measured Service: users to pay only for the resources they consume. This pay-as-you-go model enables cost optimization

Types of Cloud Computing Services 🌐

• Infrastructure as a Service (IaaS) 💼 H/w : Cloud Provides virtualized computing resources over the internet, cloud Manage to the servers, storage, virtualization and networking.

EX : VM , Ec2

• Platform as a Service (PaaS) 🛠️ H/w + S/w : Cloud Provides platform customers to develop, run, and manage applications

Ex : cloud app engine , cloud generator

• Software as a Service (SaaS) 📦 S/w : Cloud Manage software applications over the internet

Ex : google drive, email, google workspace

Types of Cloud Deployment Models

1. Public Cloud ☁️:

   • Services are provided over the internet by third-party providers.

   • Resources are shared among multiple users.

   • Examples: AWS, Azure, Google Cloud.

2. Private Cloud 🏠:

   • Resources are exclusively used by a single organization.

   • Can be hosted on-premises or by a third-party provider.

   • more security.

   • Examples: open stock, VmWare

3. Hybrid Cloud 🌐🏠:

   • Combines public and private cloud environments.

4. Community Cloud 🏘️:

   • one or more groups of organization.

🖥️Virtualization :

Virtualization is a Technology that transform hardware (physically) into software (logically)

OR

It is a Technology of Splitting a physical Resource into as may logical resource as we want

The Importance of Isolation 🛡️

• Isolation is the virtual environments remain separate and secure.

What is a Hypervisor?

• A hypervisor is a software layer that enables the creation and management of virtual machines (VMs) on physical hardware.

• It acts as a mediator between the physical hardware and the virtualized environments, allowing multiple operating systems to run concurrently on a single machine.

Types of Hypervisors

1. Type 1 Hypervisor (Bare Metal)

   • Installed directly on the physical hardware, replacing the host operating system.

   • Provides direct access to hardware resources for improved performance.

   • Examples: VMware vSphere/ESXi, Microsoft Hyper-V, Xen.

2. Type 2 Hypervisor (Hosted)

   • Runs on top of a host operating system.

   • Less efficient than Type 1 due to an additional layer between the hypervisor and hardware.

   • Suitable for development, testing, and desktop virtualization.

   • Examples: VMware Workstation, Oracle VirtualBox, Parallels Desktop.