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	Topic: WEB DEVELOPMENT Web Development as opposed to Web Design is the process of creating websites with functionality above and beyond displaying static content. While Web Design is concerned with the layout, look, feel and aesthetics of a website, Web Development is concerned with how the content is delivered, where it is stored, who can edit it, and what viewers can do with it. What you can learn here The following topics have been ordered to help provide a pathway for you to learn the main skills of web development. Optional Prerequisites Install a Web Server - If you are going to have a web site you have to have a way to serve the pages. This lesson shows you how to get a basic web server running. Getting Started Web Design/Getting Your Site On the Web - So you've got your site, now you need to get it on the web for everyone to see! Select and Install a Content Management System - Do you want to upload your HTML files to your site every time you make a change or do you want to edit your site through the site itself? Do you want to have users and security? Do you need extra functionality? A Content Management System sets the stage for your website. Using the Right Tools - See a growing list of selecting the right tools for the job! Web Development Web Application Frameworks - Before we start extending the web, lets look at how it works. Security - "Security is hard." Jim Fulton, chief Zope architect. Web Languages - ASP.Net, Java, PHP, Python, Ruby. All you need is one language to create the next greatest thing. Now, which one.... Data Persistence - In addition to having the programming skills, you also need to do something with all that data. How and where you store it can have a significant impact on your system. Web Applications E-Commerce Data-entry/Workflow Subscription Services THE INTERNET The Internet is the worldwide "network of networks" that links millions of computers together via copper wires, fiber-optic cables, wireless connections, and other telecommunications channels. It is a massive network of networks, a networking infrastructure, forming a network in which any computer can communicate with any other computer as long as they are both connected to the Internet. Information that travels over the Internet does so via a variety of languages known as protocols.This publicly accessible network of interconnected computer networks communicate using a set of protocols and standards, the most basic of which are TCP/IP. TCP/IP consists of the Transmission Control Protocol in conjuntion with the Internet Protocol. Other protocols such as DHCP, DNS, FTP, HTTP, IRC, MIME, POP3, SMTP, SSH, TELNET, RTP and many more help hold the whole thing together. This learning resource will look mostly at the technical aspects of the Internet, but may eventually cover social, economic, historical and other aspects. A popular way to visualize the complexity of the Internet is to see it as a stack of layers known as the OSI model, short for Open Systems Interconnection model. OSI Layers: * Layer 7: Application Layer – the main interface for the user(s) to interact with the application and therefore the network * Layer 6: Presentation Layer – transforms data to provide a standard interface for the Application layer * Layer 5: Session Layer – controls the dialogues (sessions) between computers * Layer 4: Transport Layer – provides transparent transfer of data between end users and machines * Layer 3: Network Layer – provides the functional and procedural means of transferring variable length data sequences from a source to a destination via one or more networks * Layer 2: Data Link Layer – provides the functional and procedural means to transfer data between network entities and to detect and possibly correct errors that may occur in the physical layer * Layer 1: Physical Layer – defines all the electrical and physical specifications for devices and the communications media