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AWS: Cloud Servers

First a user gives a client a URL, the client builds a request for information or resources to be generated by a server. When the server receives that request, it uses the information included in the request to build a response that contains the requested information. Once built, that response is sent back to the client in the requested format, to be rendered to the user.

A server program awaits and fulfills requests from client programs, which might be running in the same, or other computers. A given application in a computer might function as a client with requests for services from other programs and as a server of requests from other programs.

It is the process of installing, configuring, and enabling a specific application or set of applications, usually through an application manager app manager or software management system, to a specific URL on a server.

Server: a server is a computer program or device that provides a service to another computer program and its user, also known as the client.
Pub/Sub: Pub/Sub allows services to communicate asynchronously, with latencies on the order of 100 milliseconds, and enables you to create systems of event producers and consumers, called publishers and subscribers. Publishers communicate with subscribers asynchronously by broadcasting events, rather than by synchronous remote procedure calls (RPCs).
WRRC: the request/response cycle is a useful guide to see how all the app’s files and folders fit together. The request/response cycle traces how a user’s request flows through the app. Understanding the request/response cycle is helpful to figure out which files to edit when developing an app .

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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