What is a client?
A service requester.
What is a server?
A service provider.
Which HTTP method does a browser issue to a web server when you visit a URL?
GET method.
What three things are on the start-line of an HTTP request message?
HTTP method, request target and HTTP version.
What three things are on the start-line of an HTTP response message?
The protocol version, status code and status text.
What are HTTP headers?
HTTP headers let the client and the server pass additional information with an HTTP request or response.
Where would you go if you wanted to learn more about a specific HTTP Header?
MDN.
Is a body required for a valid HTTP request or response message?
No.