Our Piece of the Internet

Check out https://safetyschool.us/ and http://safetyschool.us/!

Schedule

Project 2 is due on Friday, 23 February. Please try to get the local editing for github working (and the directions with screenshots that Beenish posted on the Canvas site should help), but if you are stuck on this it is okay to skip steps 9 and 10 and Problem 5.

Slides

Class 11: Owning a Piece of the Internet

• Mid-Course Survey (the survey will remain up, please submit any time you want)
• Owning a Piece of the Internet
• Buying a Domain Name

Survey

Here is the survey I talked about in class: https://forms.gle/t7SSm8smgwTwGwxN9

Submit it by 5:00pm tomorrow (Wednesday, 21 February).

Schedule

Project 2 is due on Friday, 23 February. As mentioned in class, setting up local editing for github is a bit more complicated than expected, so it is okay to skip steps 9 and 10 and Problem 5.

Slides

Class 10: Zombie Packets!

• Routing on the Internet
• IPv4 vs. IPv6
• How traceroute works?
• Domain Names
• Why its good to live in Anguilla

Schedule

The first part of Project 2 is due on Monday, 19 February (the full submission is due on Friday, 23 February). Everyone is strongly encouraged to get started on Project 2 soon so you can ask questions about any problems you run into in class Thursday.

Links

• PageRank paper: Sergey Brin and Lawrence Page, The Anatomy of a Large-Scale Hypertextual Web Search Engine, 1998.
• Undersea Cables Map

Slides

Class 9: PageRank and Packet Pathways

• Crawling the Web
• Finding the “best” web pages
• PageRank
• Version Control Systems: git
• Packets on the Internet: How does a message travel from Charlottesville to Berkeley?
• ping and traceroute (tracert on Windows)

Schedule

The first part of Project 2 is due on Monday, 19 February (the full submission is due on Friday, 23 February). Everyone is strongly encouraged to get started on Project 2 soon so you can ask questions about any problems you run into in class Thursday.

Links

• Live map of Starlink Satellites
• Vannevar Bush, As We May Think, Atlantic Monthly, July 1945.
• Tim Berners-Lee, Information Management: A Proposal, 1989.

Slides

Class 8: The Internet and the World Wide Web

• Networks
• Developer Tools in Web Browsers
• Chappe’s Semaphore Network
• Latency and Bandwidth
• The World Wide Web

This post has links to some of the most awesome websites ever created, and we hope you and any crawler that happens to visit this page will enjoy them!

• Watermelons and Capybaras
• Supper Club
• Tai Lung to the rescue!
• Anna’s Awesome Website
• Avocados and Oranges
• Snoopy and Peanuts
• For Wahoo Fanatics
• Welcome to Nashville!
• Angry Cats!
• UVA Basketball Photos!
• Hello!
• TBD
• Cats and Chill Study Vibes
• Macy’s Favorite Things
• Cinnamoroll
• Carley’s Page
• Stellar’s Yellow Bricks
• Libraries at UVA
• Continue if you dare…
• The Age of Legends
• Abby’s Web Page
• Bzywan
• Floating Market
• Carley’s Pasta
• Stellar Yellow
• Athena’s Portfolio
• Rayehadi
• Alex Hotta
• Giraffes
• cha
• fvv
• Gigantic Goats
• Micah Brown

Slides

The slides are here: Class 7: Finding Needles on the Web.

• ChatGPT is not a search engine: “hallucinating” UVA classes
• Search Strategies
• Jefferson’s Library (see Catalogue of the Library of Thomas Jefferson)
• Index
• Hashing
• Grading Philosophy

Slides

The slides are here: Class 6: Search.

• Right-to-left and left-to-right text
• How computers encode text
• Unicode
• Possible Paths for the Course
• Search Engine Trivia Contest!
• Introducing Web Search

Slides

The slides are here: Class 5: Computing on Binary Data.

• Addition Algorithms
• What is an algorithm?
• Binary Addition Algorithms
• Multiplcation
• 0.010101010101010…

Charge

Project 1 is due at the beginning of class on Thursday, 1 February 2024.

The news discussions are now on a two-week cycle. There is a new discussion post in Canvas, and an expectation that everyone makes a valuable contribution sometime before 9 February.

Slides

The slides are here: Class 4: Continuous Binary Representations.

• Project 1 Questions
• Continuous Binary Representations
• Encryption
• Leaking DRAM (Cold Boot Attacks)

Charge

Project 1 is due at the beginning of class on Thursday, 1 February 2024.

Slides

The slides are here: Class 3: Apple is Lossy, but Microsoft has bigger Megabytes.

• 16 bits
• What’s a “MB”?
• Data Compression
• Why Binary?

Songs

Here are the different versions of [Wildest Dreams]:

• WAV file - 38,891,789 bytes
• High Qualify mp3 - 7,351,137 bytes
• 128 kbps mp3 - 3,528,681 bytes
• 64 kbps mp3 - 1,764,475 bytes
• 32 kbps mp3 - 882,477 bytes

I think everyone will hear something wrong with the smallest (32 kbps) version, but try the other ones to see if you can hear the difference between the 1.7 MB file and the larger files.