AWS provides a variety of computing and networking services to meet the needs of your applications. You can provision virtual servers, set up a firewall, configure Internet access, allocate and route IP addresses, and scale your infrastructure to meet increasing demand. You can use the compute and networking services with the storage, database, and application services to provide a complete solution for computing, query processing, and storage across a wide range of applications.

Before emerging the cloud computing, there was Client/Server computing which is basically a centralized storage in which all the software applications, all the data and all the controls are resided on the server side. If a single user wants to access specific data or run a program, he/she need to connect to the server and then gain appropriate access, and then he/she can do his/her business.

Amazon Elastic Compute Cloud (Amazon EC2) is a web administration that gives secure, resizable process limit in the cloud. It is intended to make web-scale distributed computing simpler for designers. Amazon EC2’s straightforward web benefit interface enables you to get and arrange limit with insignificant grinding.

Elastic Load Balancing consequently disseminates approaching application activity over various Amazon EC2 examples. It empowers you to accomplish adaptation to internal failure in your applications, flawlessly giving the required measure of load adjusting limit expected to course application movement.

AWS stands for Amazon Web Service; it is a collection of remote computing services also known as cloud computing platform. This new realm of cloud computing is also known as IaaS or Infrastructure as a Service.

S3 stands for Simple Storage Service. You can use S3 interface to store and retrieve any amount of data, at any time and from anywhere on the web. For S3, the payment model is “pay as you go”

AMI stands for Amazon Machine Image. It’s a template that provides the information (an operating system, an application server and applications) required to launch an instance, which is a copy of the AMI running as a virtual server in the cloud. You can launch instances from as many different AMIs as you need.

From a single AMI, you can launch multiple types of instances. An instance type defines the hardware of the host computer used for your instance. Each instance type provides different compute and memory capabilities. Once you launch an instance, it looks like a traditional host, and we can interact with it as we would with any computer.

An AMI includes the following things
A template for the root volume for the instance
Launch permissions decide which AWS accounts can avail the AMI to launch instances
A block device mapping that determines the volumes to attach to the instance when it is launched

By default, you can create upto 100 buckets in each of your AWS accounts.