25. HTTP: The Postal Service of the Internet

1. 25.1. How the Internet Works
   1. 25.1.1. Servers and Clients
   2. 25.1.2. Protocols
      1. 25.1.2.1. HTTP
      2. 25.1.2.2. TCP/IP
      3. 25.1.2.3. DNS
   3. 25.1.3. Web Addresses
      1. 25.1.3.1. Scheme
      2. 25.1.3.2. Host
      3. 25.1.3.3. Port
      4. 25.1.3.4. Path
      5. 25.1.3.5. Query String
   4. 25.1.4. Putting It All Together
   5. 25.1.5. Check Your Understanding
2. 25.2. HTTP at a Glance
   1. 25.2.1. Requests and Responses
   2. 25.2.2. The Postal Service of the Internet
   3. 25.2.3. Check Your Understanding
3. 25.3. Requests
   1. 25.3.1. Request Methods
      1. 25.3.1.1. The GET Method
      2. 25.3.1.2. The POST Method
   2. 25.3.2. Headers
   3. 25.3.3. Body
   4. 25.3.4. Check Your Understanding
4. 25.4. Responses
   1. 25.4.1. Response Codes
   2. 25.4.2. Response Headers
   3. 25.4.3. Response Body
   4. 25.4.4. Check Your Understanding
5. 25.5. HTTP in the Browser
   1. 25.5.1. Viewing Requests and Response Using Developer Tools
      1. 25.5.1.1. Before You Get Started
      2. 25.5.1.2. Working In the Browser
   2. 25.5.2. Browser Flow
   3. 25.5.3. Check Your Understanding