Lecture 5

Question 1

HTTP is a stateless protocol. What does this mean?

Answer 1

Nothing is remembered between transactions

Question 2

What is the structure of an HTTP message?

Answer 2

Initial request/response line

0 or more header lines

Empty line

Optional message body

Question 3

What is the structure of an HTTP request line?

Answer 3

<method> <path> <version></version></path></method>

e.g.

GET path/to/file/index.html HTTP/1.0

Question 4

What is the structure of an HTTP repsonse line?

Answer 4

<version> <code> <description></description></code></version>

e.g.

HTTP/1.0 200 OK

or HTTP/1.0 404 Not Found

Question 5

A 1xx response code indicates:

Answer 5

an informational message

Question 6

A 2xx response code indicates:

Answer 6

success of some kind

Question 7

A 3xx response code indicates:

Answer 7

redirection to another url

Question 8

A 4xx response code indicates:

Answer 8

an error on the client’s part

Question 9

A 5xx response code indicates:

Answer 9

an error on the server’s part

Question 10

What is a HEAD request?

Answer 10

The same as a GET request but:

only returns response headers not the actual resource

useful to check charactersitics of a resource without actuall d/ling it

Question 11

What is a POST request?

Answer 11

Sends data to the server usually for some sort of processing

request URI is not a resource to retrieve but the program to handle the data being sent