4.2 - CompTIA A+ Core 1

Common cloud models

Private cloud

• Private cloud: The cloud environment is only available to the person/organization that deployed it.

Public cloud

• Public cloud: The cloud environment is available to everyone over the internet.

Hybrid cloud

• Hybrid cloud: A mixture of public and private cloud environments.

  • Allows for greater flexibility and scalability by enabling organizations to keep sensitive data secured in private infrastructure while utilizing public resources for less critical functions.

Community cloud

• Community cloud: Cloud infrastructure shared between multiple organizations.

Infrastructure as a service (IaaS)

• Infrastructure as a Service (IaaS): Sometimes called hardware as a service (HaaS) - allows deployment of virtualized computing resources over the internet, such as CPU, networking, memory, or web services. The end user is responsible for configuring and deploying the services.

  • Most data oversight for the end user - they have full control over the data in an IaaS environment.

Software as a service (SaaS)

• Software as a Service (SaaS): Complete on-demand applications hosted over the internet - requires no local installation or configuration from the users. End users log in and use the service.

  • No data oversight from the end user - data is managed by a vendor

Platform as a service (PaaS)

• Platform as a Service (PaaS): Vendor provides end user with an enviornment used to develop applications - someone else handles the platform while the client focuses on building and developing applications with the available platform modules/resources.

  • Vendor may provide client with control over specific modules or pages, but not direct control over data or infrastructure.

  • Good examples is Salesforce.com.