http-messages-recap

Question 1

What is a client?

Answer 1

a program or device that is on the receiving end of a service

Question 2

What is a server?

Answer 2

a program or device that provides a service to another program or device

Host is the hardware that a software server runs on

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

An HTTP method, GET POST etc, followed by a resource target (a thing you can get) follwed by a protocol version

GET example.com HTTP/1.1

Question 5

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

Answer 5

Protocol version, status code, 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 via the metadata they contain.

Question 7

Is a body required for a valid HTTP message?

Answer 7

Not all have one, fetching requests like POST GET HEAD DELETE or OPTIONS don’t have one. some requests simply send data to the server to update it like POST