Exercise 7.2 Briefly answer the following questions about the HTTP protocol: What is a com...

Exercise 7.2 Briefly answer the following questions about the HTTP protocol:

1. What is a communication protocol?
2. What is the structure of an HTTP request message? What is the structure of an HTTP response message? Why do HTTP messages carry a version field?
3. What is a stateless protocol? Why was HTTP designed to be stateless?
4. Show the HTTP request message generated when you request the home page of this book (http://www.cs.wisc.edu/~dbbook). Show the HTTP response message that the server generates for that page.