Web Science/Part1: Foundations of the web/Internet vs World Wide Web/Motivation and requirements for the World Wide Web

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Web Science/Part1: Foundations of the web

Web Science/Part1: Foundations of the web/MoocIndex

Web Science/Part1: Foundations of the web/Internet vs World Wide Web/Motivation and requirements for the World Wide Web

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Motivation and requirements for the World Wide Web

Obiettivi di apprendimento

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Quiz

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Obiettivi di apprendimento

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1 What is true about Hypertext?

	It was first conceived by Tim Berners-Lee
	The ideas are older than Computers
	People in the late 40's already thought of this
	Hyperlinks are always created in two directions
	It needs a central server to coordinate the link network

2 Which problems has led to the invention of the World Wide Web

	CERN was keen on making software inventions for computing
	CERN had a need for an information management system
	loads of different hardware existed and information should be easy to exchange independent on what hardware it was stored
	TCP was still not a fully reliable protocol
	gopher started to use a commercial licence
	Various operating systems and formats for data existed.
	Systems for linking information in documents would not scale or operate successfully on the Internet

3 What technical building blocks were essential for the World Wide Web?

	Ethernet
	TCP
	IP
	Linux
	DNS
	Hypertext

Ulteriori letture

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Discussioni

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1. Ethernet
   1. Communication over a shared Medium
   2. Ethernet header
   3. Minimum package length vs maximum cable length
   4. Collision detection
   5. Summary, further reading, homework
2. Internet Protocol
   1. Motivation for IP
   2. Classful IPv4 networks
   3. IP forwarding algorithm
   4. IP header
   5. Summary, further reading, homework
3. Transmission Control Protocol
   1. End to end principle and connection oriented communication
   2. Three way handshake
   3. Port numbers
   4. Sliding window and flow control
   5. Summary, further reading, homework
4. Domain Name System
   1. Tree structure
   2. Terminology
   3. Zones
   4. Review some facts about DNS
   5. Delegating DNS queries
   6. DNS address resolution
   7. Summary, further reading, homework
5. Internet vs World Wide Web
   1. Summary of the internet architecture
   2. Motivation and requirements for the World Wide Web
   3. Design principles of the web
   4. Uniform Resource Identifier
   5. Summary, further reading, homework
6. Hypertext Transfer Protocol
   1. Making HTTP requests
   2. A simple web client
   3. A simple web server
   4. HTTP header
   5. Content negotiation
   6. Summary, further reading, homework
7. Web content
   1. Problem setting for web content formats
   2. Working with XML
   3. HTML for web document structures
   4. Layout elements in HTML
   5. Motivating separation of content and layout
   6. Cascading Style Sheets
   7. Media content
   8. Metadata
   9. Summary, further reading, homework
8. Dynamic Web Content
   1. Basics of server side web programming
   2. Forms and HTTP post request
   3. Handling a post request in a Java Servlet
   4. Client side JavaScript
   5. Ajax and the XMLHttpRequest class
   6. Summary, further reading, homework

Summary of the internet architecture

Design principles of the web