HTTP

Question 1

What is a client?

Answer 1

service requesters

Question 2

What is a server?

Answer 2

the providers of a resource or service

Question 3

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

Answer 3

GET

Question 4

What three things are on the start-line of an HTTP request message?

Answer 4

HTTP method, request target, and HTTP version

Question 5

What three things are on the start-line of an HTTP response message?

Answer 5

Protocol version, status code, status text

Question 6

What are HTTP headers?

Answer 6

HTTP headers specify the request or describe the body included in the message.

Question 7

Where would you go if you wanted to learn more about a specific HTTP Header?

Answer 7

MDN

Question 8

Is a body required for a valid HTTP request or response message?

Answer 8

No

Question 9

What is AJAX?

Answer 9

AJAX allows you to request data from a server and load it without having to refresh the page.

A way of making asynchronous computer requests.

Question 10

What does the AJAX acronym stand for?

Answer 10

Asynchronous JavaScript and XML

Question 11

Which object is built into the browser for making HTTP requests in JavaScript?

Answer 11

XMLHTTPRequest

Question 12

What event is fired by XMLHttpRequest objects when they are finished loading the data from the server?

Answer 12

load event

Question 13

Bonus Question: An XMLHttpRequest object has an addEventListener() method just like DOM elements. How is it possible that they both share this functionality?

Answer 13

It is related to the EventTarget