Web Engineering Lecture # 1, Slides of Web Programming and Technologies

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Web Engineering

Lecture # 1

Course Schedule

■ Lectures — (^) Wednesday-Friday: 10:00AM--11:00AM ■ Sessional Marks — (^) Assignments 10% — (^) Quizzes 10% — (^) Project 10% ■ (^) Mid exam — (^) 30% ■ Final exam — (^) 50%

Prerequisites

■ Programming Fundamentals ■ Object Oriented Programming

Expectations

What do you want (or expect) to learn from

this course?

A common Misconception

■ (^) Is Internet and Web same thing?

Internet

It is a global system of interconnected computers that uses standard protocols (TCP/IP) to link several billion devices worldwide.

History (cont…)

■ The technology continued to grow in the 1970s after scientists Robert Kahn and Vinton Cerf developed Transmission Control Protocol and Internet Protocol, or TCP/IP, a communications model that set standards for how data could be transmitted between multiple networks. ■ ARPANET adopted TCP/IP on January 1, 1983, and from there researchers began to assemble the “network of networks” that became the modern Internet. DNS (Domain Name Server) was established in

■ In 1986, NSFNET (National Science Foundation Network) was created in US for academic research.

History (cont…)

■ (^) HTTP protocol was introduced in 1990. ■ (^) It allowed graphics to be sent along with text. ■ (^) By 90’s, Internet connected virtually almost all colleges and universities.

Internet Service Providers  (^) Tier 1 Networks (Global Internet Service Providers) e.g. AT & T (USA), CenturyLink (USA), KPN International (Netherlands), NTT Communications (Japan)  (^) Tier 2 Networks (Regional ISP) e.g. Vodafone (UK), PCCW Global (Hong Kong)  (^) Tier 3 Networks (Local ISP) Local ISP’s, i.e. Local cable and DSL companies  (^) End Users

World Wide Web

■ (^) The complete set of linked documents (files), stored on computers throughout the world that are connected over the internet. ■ The World Wide Web —commonly referred to as WWW , W3 , or the Web—is an interconnected system of public webpages accessible through the Internet.

WWW (cont…)

■ (^) Tim Berners Lee wrote the first web server “httpd” and the first web browser “World Wide Web” later renamed to “Nexus”. ■ (^) In 1993, Marc Andreessen developed “Mosaic” web browser. It was the first browser to display images inline with text instead of in a separate window ■ (^) In 1995, Microsoft came out with “Internet Explorer”.

Important Web Terminologies

Types of Web Browser

■ (^) Text-based Browser ■ (^) Graphical Browser

Text-based Browser

■ This browser renders only the text of web pages, and ignores graphic contents. ■ (^) Usually, it render pages faster than graphical web browsers due to lowered bandwidth demands. ■ (^) Examples are: — (^) Line Mode Browser (1990 by Tim Berners-Lee) — (^) Lynx (1992 up till now)