(Informatique) Recherche documentaire sur le Web AC3

Introduction to Document Research on the Web

Overview of the Activity

• The session begins with an introduction to a documentary research activity focused on water pollution, assigned by the French language teacher.

• Students are tasked with preparing a presentation and must consider effective means for research.

Understanding Internet and Networks

• The instructor discusses various types of networks:

• Local Area Network (LAN) for buildings.

• Metropolitan Area Network (MAN) for cities.

• Wide Area Network (WAN), which is global in scope.

• The term "Internet" is explained as a combination of "inter" (international) and "net" (network), emphasizing its role as a global network connecting computers.

Importance of Internet for Research

• Internet serves multiple purposes:

• Communication across cultures.

• Information retrieval, particularly relevant to the topic of water pollution.

• The World Wide Web (WWW) is highlighted as a key service within the internet, allowing access to resources through hyperlinks. It’s clarified that WWW is not synonymous with the internet itself.

Client-Server Model and Protocols

How Browsers Work

• A client-server model is described where:

• The server holds information in programming language.

• The client (browser) translates this data into user-friendly web pages.

Communication Protocols

• HTTP (Hypertext Transfer Protocol) is introduced as the primary protocol used for displaying web content, while HTTPS indicates a secure version of this protocol.

Understanding Web Pages and Sites

Definition of Key Terms

• A web page is defined as an electronic document containing text, images, forms, and multimedia elements.

• A website consists of interconnected web pages linked via hypertext links. There are approximately two billion websites currently available online.

Hyperlinks Explained

• Hyperlinks are described as clickable elements that connect different parts of documents or direct users to other documents/files; they can be recognized by their distinct color or cursor change when hovered over.

Types of Information Available on the Web

Diverse Content Areas

• Various domains accessible via the internet include:

• Business: Companies utilize websites for marketing.

• Entertainment: Websites offer games, music, films.

• Education: Universities provide information about their activities online.

• Government: State organizations publish citizen-related information online.

Conclusion and Next Steps

Summary of Key Concepts

• Recap includes understanding internet services like email and file transfer along with recognizing web pages as units within the WWW framework that contain diverse content types such as text and images.

Upcoming Assignments

• Students are instructed to prepare practical work involving research on internet history, focusing on key dates in technology evolution for discussion in future sessions related to their presentations on water pollution topics.