AZ-900 자격증 준비 3 - Describe cloud service types

Lesson 3: Describe cloud service types

3.1 Describe Infrastructure as a Service

IaaS is the most flexible cloud services, as it provides you the maximum amount of control for your cloud resources.

In an IaaS model, the cloud provider is responsible for maintaining the hardware, network connectivity and physical security

You are responsible for installation and configuration, patching and updates, and security.

 

 

Scenarios

• Lift-and-shift migration: You are setting up cloud resources similar to your on-prem datacenter, and then simply moving the things running on-prem to running on the IaaS infrastructure.
• Testing and development: You have established configurations for development and test environments that you need to rapidly replicate (you can start up or shut down the different environments rapidly with IaaS structure, while maintaining complete control).

 

 

3.2 Describe Platform as a Service

PaaS is a middle ground between renting space in a datacenter (IaaS) and paying for a complete and deployed solution (SaaS).

In a PaaS environment, the cloud provider maintains the physical infrastructure, physical security and connection to the internet. 

PaaS (unlike IaaS) also maintains the operating systems, databases and development tools.

PaaS well suited to provide a complete development environment without maintaining all the development infrastructure.

 

Scenarios

• Development framework: PaaS provides a framework that developers can build upon to develop or customize cloud-based applications (lets developers create applications using built-in software components).
• Analytics or business intelligence: Tools provided allow organizations to analyze and mine their data, finding insights and patterns and predicting outcomes to improve forecasting, product design decisions and other business decisions.

 

 

Describe Software as a Service

SaaS is the model that places the most responsibility with the cloud providre and the least with the user.

In a SaaS environment you are responsible for the data that you put into the system, the devices that you allow to connect to the system, and the users that have access.

 

Scenarios

• Email and messaging
• Business productivity applications
• Finance and expense tracking

 

 

Module Assignment

1. Which cloud service type is most suited to a lift and shift migration from an on-premises datacenter to a cloud deployment?

Infrastructure as a Service (IaaS)

 

2. What type of cloud service type would a Finance and Expense tracking solution typically be in?

Software as a Service (SaaS)