Intro to AWS Flashcards
What is the client-server model?
Client can be a web browser or desktop app that a person interacts with to make requests to computer servers.
E.g. a client requests a funny video, the server evaluates details of the requests and fulfils it by returning information
What is Amazon Elastic Compute Cloud (Amazon EC2)
A type of virtual server.
Provides secure, resizable compute capacity in the cloud as EC2 instances (virtual machines)
Runs on top of physical host machines managed by AWS
Instances are held on a host containing other EC2 instances, but they’re kept separate and secure
You have control over the configuration of EC2 instances (e.g. the OS and software on it)
Multitenancy – Sharing underlying hardware between virtual machines (managed by Hypervisor)
What is Cloud Computing?
The on-demand delivery of IT resources via the internet with PAYG pricing.
Orgs can acquire technology like compute power, data bases, storage on an as needed basis.
Like how we use as much electricity as we need, and the power company provides.
What are the different cloud deployment models?
Cloud Based (public)
On-Premises (private)
Hybrid
What is Cloud based?
Run all parts of the app in the cloud.
Migrate existing apps to the cloud.
Design and build new apps in the cloud.
What is on-premises?
E.g. apps that run on technology that is fully kept in a on-premises data centre.
Deploy resources by using virtualisation and resource management tools.
Increase resource utilisation by using app management and virtualisation technologies
What is hybrid?
Connects cloud-based resources to on-premises resources.
Integrate cloud-based resources with legacy IT apps.
Could be used for orgs prefer/have requirements to keep legacy apps on prem.
