AWS Fundamentals

What is Cloud Computing?

Cloud computing is the on-demand delivery of compute power, database storage, applications, and other IT resources through a cloud services platform via the internet with pay-as-you-go pricing.

AWS Shared Responsibility Model

AWS responsibility “Security of the Cloud” - AWS is responsible for protecting the infrastructure that runs all of the services offered in the AWS Cloud. This infrastructure is composed of the hardware, software, networking, and facilities that run AWS Cloud services.

Customer responsibility “Security in the Cloud” -Customer is responsible for everything that goes IN the cloud (data, encryption, IAM, software, etc.)

It is crucially important to understand which components and parts of AWS are your responsibility for each service. For example, with EC2 you maintain control over the OS, whereas with RDS, AWS is responsible for the OS. The Shared Responsibility model will show up heavily on the exam. Additional details are available on the AWS website in form of various documentation.


CORE AWS SERVICES

COMPUTE 

1) AWS Lamda
  • AWS Lambda is a serverless, event-driven compute service that lets you run code for virtually any type of application or backend service without provisioning or managing servers. You can trigger Lambda from over 200 AWS services and software as a service (SaaS) applications, and only pay for what you use.
  • Run code without provisioning or managing infrastructure. Simply write and upload code as a .zip file or container image.
  • Automatically respond to code execution requests at any scale, from a dozen events per day to hundreds of thousands per second.
  • Save costs by paying only for the compute time you use—by per-millisecond—instead of provisioning infrastructure upfront for peak capacity.
  • Optimize code execution time and performance with the right function memory size. Respond to high demand in double-digit milliseconds with Provisioned Concurrency.



2) EC2

Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides secure, resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers. Amazon EC2’s simple web service interface allows you to obtain and configure capacity with minimal friction. It provides you with complete control of your computing resources and lets you run on Amazon’s proven computing environment.








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