Cloud Concepts Flashcards
Understand Fundamental Cloud Concepts
What is Elasticity?
Ability to increase or decrease the instance count or size of existing resources based on fluctuations in traffic, load, or resource workload.
What is Low Latency?
The ability of a cloud service to be accessed quickly from any location via the internet.
What is PaaS and what is its primary use?
Platform as a Service. Primarily used for development and business analysis. Client controls only the applications and data, the infrastructure is owned and controlled by the cloud service provider.
What is economy of scale?
The ability to do things more efficiently or at a lower cost per unit when operating on a larger scale. The more you buy of something the less it costs.
What is SaaS and what is its primary use?
Software as a Service. Primarily used for applications. Completely controlled by the provider, users log in via the internet with a login ID and password and use it as needed.
What is IaaS and what is its primary use?
Infrastructure as a Service. Primarily used as virtual data centers. Provider controls the physical hardware, but the client controls the applications, operating systems, and configurations.
Microsoft Office 365 is an example of which cloud service?
Software as a Service (SaaS)
What is Fault Tolerance?
The concept of ensuring that servers are available if a single data center goes offline.
What are the characteristics of private clouds?
High Scalability Improved Security Cap-Ex over Op-Ex Control over the Hardware Single Organization owned
What is Scalability?
Ability to increase the instance count or size of existing resources.
What is Cap-Ex?
Capital Expense. Up-front investment
Creates benefits over a long period of time
i.e., your own data center
What is the consumption based pricing model?
Pay only for what you use, no up front investment
What is Op-Ex?
Operating Expense. No up-front investment
Creates immediate benefits
i.e., using cloud services
What is a Hybrid Cloud?
Combination of public and private clouds
i.e., your data center + Azure, Azure + AWS
What is a Public Cloud?
Resources in the cloud shared across multiple tenants/customers
i.e., Azure, AWS, Google Cloud