http messages recap

Question 1

What is a client?

Answer 1

a client is a piece of computer hardware or software that accesses a service made available by a server as part of the client–server model of computer networks.

Question 2

What is a server?

Answer 2

a server is a piece of computer hardware or software (computer program) that provides functionality for other programs or devices, called “clients”.

Question 3

Which HTTP method does a browser issue to a web server when you visit a URL?

Answer 3

GET

Question 4

What is on the first line of an HTTP request message?

Answer 4

HTTP method, request target, and HTTP Version

Question 5

What is on the first line of an HTTP response message?

Answer 5

The status line:

The protocol version
A status code, indicating success or failure of the request. Common status codes are 200, 404, or 302
A status text.

HTTP/1.1 404 Not Found.

Question 6

What are HTTP headers?

Answer 6

HTTP headers let the client and the server pass additional information with an HTTP request or response.

Question 7

Is a body required for a valid HTTP message?

Answer 7

No it’s optional