Web Science/Part1: Foundations of the web/Ethernet

1

Web Science/Part1: Foundations of the web

Web Science/Part1: Foundations of the web/Ethernet

Web Science/Part1: Foundations of the web/MoocIndex

• edit MOOC index

Ethernet

Learning goals

Associated units

Further reading

Discussion

Learning goals

1. understand that ethernet is a nondeterministic protocol
2. be able to understand requirements for the link layer in the TCP/IP Protocol suite
3. understand the collision detection in ethernet
4. understand why randomization is a good idea in nondeterministic protocols
5. be able to name a deterministic link layer protocol

Associated units

• 
• 
• 
• 

6

open

6

questions

Communication over a shared Medium

1. understand the basic problems when communicating over a shared medium
2. understand the origins of ethernet

• 
• 
• 
• 

9

open

11

questions

Ethernet header

be able to name the ethernet header fields

be able to explain the reason for the preamble

• 
• 
• 
• 

7

open

11

questions

Minimum package length vs maximum cable length

understand that the cable length has an influence to transfer rate

understand that speed of light is responsible for the connection between cable length and transfer rate

be able to calculate the maximum cable length for a given transfer rate

understand that the cable length is part of the Ethernet protocol

• 
• 
• 
• 

2

open

9

questions

Collision detection

Understand that Ethernet is a non deterministic program

Be able to reconstruct a collision detection / resolve algorithm

Understand what happens if two computers send data at the same time

• 
• 
• 
• 

1

open

1

question

Summary, further reading, homework

no learning goals defined

new unit

Further reading

1. The Webs Awake (An Introduction to the Field of Web Science and the Concept of Web Life by Philip D. Tetlow.
2. Foundations and Trends in Web Science, Volume 1 Issue 1 by Tim Berners-Lee, Wendy Hall, James A. Hendler, Kieron O'Hara, Nigel Shadbolt and Daniel J. Weitzner.

Discussion

Navigation

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