Six Advantages Of Cloud Computing

Trade Capital Expense for variable expense Instead of investing heavily in data centers and servers before you use them you can pay for how much you are gonna use.
Benefit from massive economies of scale you will never have the same purchasing power as Amazon.
Stop guessing about capacity don't buy too much or too little.
Increase speed and agility A cloud Guru platform was built in 3 weeks, using a new type of design called serverless architecture. It scales infinitely with demand.
Stop spending money running and maintaining data centers
Go global in minutes

Infrastructure As A Service

You manage the server which can be physical or virtual. As well as operating system, usually the data center provider will have no access to your server

Platform As A Service

Someone else manages the underlying hardware and operating systems. You focus on applications, someone else worries about security patching, updates, maintenance etc.

Software As A Service

Think of Gmail. All you do is manage your inbox and google handles everything else.

Cloud Computing Deployment Types

Public Cloud
AWS, Azure, GCP
Hybrid
Mixture of public and private
Private Cloud (On Premise)
you host and manage it in your datacenters

AWS - High Level Services Of Note*

AWS Global Infrastructure
AWS Cost Management
Compute
Databases
Migration & Transfer
Network & Content Delivery
Security, Identity, & Compliance
Storage

CAPEX vs. OPEX

Capex:

Stands for Capital expenditure which is where you pay upfront and it is a fixed sunk in cost.

Opex - Operational Expenditure which is where you pay for what you use. - Think about it like utilities (gas, electric)

Pricing Policies

Pay as you go
Pay less when you reserve
Pay even less per unit when using more
Pay even less as AWS gross
Custom pricing

Fundamental Drivers Of Cost With AWS

Compute
Storage
Data outbound