How does the Web work? Under the hood of HTTP there's a whole stack of networking protocols.
Explore the underpinnings of the net with tools like `traceroute`, `tcpdump`, and `nc`.
Why Take This Course? As a web developer, it's handy to know a bit about the TCP/IP stack, IP addressing, DNS, and other protocols that underlie the Web technologies you use.
### Lesson 1: From Ping to HTTP
In this lesson you'll begin using command-line tools to explore the network: `ping` to check hosts, and `nc` (netcat) to manually communicate with web servers and to emulate a web server. You'll also learn about port numbers and the layering of HTTP on top of TCP.
### Lesson 2: Names and Addresses
In this lesson you'll learn about the Domain Name System (DNS). Optionally, you'll register your own domain name for your web server. You'll also learn more about the binary representation of IP addresses.
### Lesson 3: Addressing and Networks
In this lesson you'll learn more details about Internet addressing: network blocks, interfaces, network address translation (NAT), and IPv6.
### Lesson 4: Protocol Layers
In this lesson you'll use `tcpdump` to examine the packets that make up the requests and responses for three protocols: ping, DNS, and HTTP. You'll learn more about how TCP sessions work.
### Lesson 5: Big Networks
In this lesson you'll learn more about bandwidth, latency, filtering, and other properties that matter when users are accessing your application over the Internet.
MOOCs stand for Massive Open Online Courses. These arefree online courses from universities around the world (eg. StanfordHarvardMIT) offered to anyone with an internet connection.
How do I register?
To register for a course, click on "Go to Class" button on the course page. This will take you to the providers website where you can register for the course.
How do these MOOCs or free online courses work?
MOOCs are designed for an online audience, teaching primarily through short (5-20 min.) pre recorded video lectures, that you watch on weekly schedule when convenient for you. They also have student discussion forums, homework/assignments, and online quizzes or exams.