3. Networks

Great Resource: How the Internet Works (40min worth of videos) and An Introduction to Computer Networks (textbook)

  1. In what type of format is everything (text, photos, videos, etc.) encoded to transfer them between connections of the internet (regardless the medium)? How does that physically travel down a metal wire? How does that physically travel down a fiberoptic (glass) wire?

  2. Define bandwidth. How is the size of bandwidth described?

  3. Define packets [of information] - what is included in a packet? (hint: use mail as an analogy) Discuss the importance of TCP.

  4. What are modems and routers?

    • ​difference between modems and router​

      • router = connect many devices to the same network (often has hardware security included)

      • modem = connect to the internet via an ISP (often does not have hardware security included)

    • computer => router => modem => ISP => Internet

  5. Discuss the difference between IP and MAC addresses. (include the term “DNS” in your answer).

  6. Describe the difference between HTML, CSS, and Javascript.

    • ​HTML vs CSS vs JavaScript:​

      • HTML provides the basic structure of sites, which is enhanced and modified by other technologies like CSS and JavaScript.

      • CSS is used to control presentation, formatting, and layout.

      • JavaScript is used to control the behavior of different elements.