Cybersecurity: Networking Devices and Initial Configuration

Cybersecurity: Networking Devices and Initial Configuration

                                       Cloud and Virtualization

Cloud computing refers to the delivery of computing services (like servers, storage, databases, networking, software, and analytics) over the internet, or "the cloud." It allows users to access and use these resources without owning or maintaining physical hardware. 

Key Characteristics of Cloud Computing:

On-Demand Self-Service: Users can provision computing resources as needed, without requiring human intervention from the service provider.

Broad Network Access: Cloud services are accessible over the network, typically using standard devices like laptops, smartphones, or tablets.

Resource Pooling: Cloud providers use multi-tenant models, pooling resources to serve multiple customers, dynamically allocating and reallocating resources based on demand.

Scalability: Cloud resources can be scaled up or down based on usage needs. This allows businesses to respond to changing demand without large upfront investments in infrastructure.

Pay-as-You-Go: Users are billed only for the resources they use, making cloud services cost-effective, especially for businesses with fluctuating demand.

Types of Cloud Services:

Infrastructure as a Service (IaaS): Provides virtualized computing resources over the internet. Examples include Amazon Web Services (AWS) and Microsoft Azure.

Platform as a Service (PaaS): Offers hardware and software tools to developers for building and hosting applications. Examples include Google App Engine and Heroku.

Software as a Service (SaaS): Delivers software applications via the cloud. Examples include Google Workspace, Salesforce, and Microsoft Office 365.

Deployment Models:

Public Cloud: Cloud services provided over the internet by third-party providers (e.g., AWS, Azure).

Private Cloud: Cloud infrastructure operated solely for a single organization, either on-premises or hosted externally.

Hybrid Cloud: A combination of public and private clouds, allowing data and applications to be shared between them.

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