HTTP-Messages

Question 1

What is a client?

Answer 1

It is an interface that a user interacts with to receive data, content or a service

Whether a computer is a client, a server, or both, is determined by the nature of the application that requires the service functions.

The client sends a request, and the server returns a response.

Question 2

What is a server?

Answer 2

usually another computer (or in the same system) that the user accesses via the client

Whether a computer is a client, a server, or both, is determined by the nature of the application that requires the service functions.

The client sends a request, and the server returns a response.

Question 3

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

Answer 3

GET request mthod

Question 4

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

Answer 4

HTTP Method, the request target (URL usually) and HTTP version

Question 5

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

Answer 5

protocol version (usually HTTP/1.1), status code (200, 204 or 302), status text (connects to status code)

HTTP/1.1 404 Not Found

General headers – apply to the whole message.
Request headers – additional info
Entity headers – content length, data types

Question 6

Is a body required for a valid HTTP message?

Answer 6

no, requests fetching resources, like GET, HEAD, DELETE, or OPTIONS, usually don’t need one.

Question 7

What are HTTP headers?

Answer 7

meta data about request and response

General headers – apply to the whole message.
Request headers – additional info
Entity headers – content length, data types