Iaas

As explained in Acing the CCNA Exam: Volume 2 Advanced Networking and Security

Infrastructure as a service is a cloud service model that provides on-demand computing, storage, and networking resources for customer-managed operating systems and applications.

Infrastructure as a service (IaaS) provides computing, storage, and networking resources on demand. Customers use the provider’s infrastructure to create virtual machines, install operating systems, and run applications without purchasing or maintaining the underlying resources. section 17.3.2 section 17.4

IaaS is distinguished by the customer’s control of the software environment and by cloud delivery characteristics:

• Uses on-demand self-service, broad network access, pooled resources, rapid elasticity, and measured service. section 17.4
• Lets customers scale resources up or down quickly and generally pay according to measured usage. section 17.4
• Provides more infrastructure control than PaaS, while SaaS delivers completed applications instead of customer-managed virtual machines and operating systems. section 17.3.2 section 17.4

Operational scenario

An organization obtains servers, storage, and networking from AWS, Microsoft Azure, or GCP, creates virtual machines, installs operating systems, and runs its applications on the provider’s infrastructure. section 17.3.2 section 17.4

Figure 17.14 The spectrum of what is offered in each cloud service model in comparison to colocation and on-prem solutions

Compare IaaS with PaaS, SaaS, colocation, and on-premises solutions by the resources supplied and the responsibilities retained by the customer. section 17.3.2

How Acing the CCNA Exam: Volume 2 Advanced Networking and Security covers it

How deep it goes

Defines resources, customer control, elasticity, and measured usage, but does not detail provider implementation or configuration commands.

Examples

Uses virtual machines, installed operating systems, applications, AWS, Microsoft Azure, and Google Cloud Platform as examples.

What it assumes

Assumes basic awareness of servers, storage, networking, operating systems, applications, and virtualization.

What you can do after

Evaluate which cloud service model supplies infrastructure while retaining responsibility for operating systems and applications.

How it connects

Connects IaaS with SaaS, PaaS, virtualization, cloud deployment models, resource pooling, and rapid elasticity.

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Also explained in

• 

  liveBookmanning.com
  Microsoft Azure in ActionInfrastructure as a service (IaaS) is a cloud service model that provides virtualized computing, networking, and storage while leaving customers responsible for higher-level software and configuration.
• 

  liveBookmanning.com
  Azure SecurityInfrastructure as a service is a cloud service model that provides virtualized compute, storage, and networking resources for customer-managed workloads.
• 

  liveBookmanning.com
  Amazon Web Services in Action, Third Edition: An in-depth guide to AWSInfrastructure as a service is a cloud service model that provides fundamental computing, storage, and networking resources for consumption on demand.

Compare how 4 books explain iaas →

Related concepts

• platform as a servicealternative to · Platform as a service (PaaS) is a cloud service model that provides a managed application development, deployment, or runtime platform while abstracting management of the underlying infrastructure.
• virtual machineuses · A virtual machine is a software-based environment that emulates or implements an abstract computer system, providing an interface on which an operating system or programs can execute.
• virtualizationuses · Virtualization is the abstraction of physical computing, storage, or networking resources into isolated logical environments or instances that share underlying infrastructure.
• Kubernetescontrasts with · Kubernetes is an open-source platform for orchestrating and automating the deployment, scaling, and management of containerized workloads across computing clusters.
• shared-responsibility modelused by · A shared-responsibility model is an arrangement in which multiple parties divide accountability for operating, securing, managing, or assuring a system or service.

This explainer was generated by Manning's knowledge graph from the text of Acing the CCNA Exam: Volume 2 Advanced Networking and Security. The section links point to the parts of the book it draws on.