HTTP

Question 1

HTTP Messages:
What is a client?

Answer 1

service requesters

Question 2

HTTP Messages:
What is a server?

Answer 2

providers of a resource or service

Question 3

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

Answer 3

GET

Question 4

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

Answer 4

a HTTP method (get, put, post)
a request target (a URL, path you’re sending to)
the HTTP version

Question 5

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

Answer 5

The protocol version (usually HTTP 1.1)
A status code
A status text

Question 6

HTTP Messages:
What are HTTP headers?

Answer 6

a way to give additional data about the message you’re currently sending

Question 7

HTTP Messages:
Where would you go if you wanted to learn more about a specific HTTP header?

Answer 7

MDN

Question 8

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

Answer 8

no

Question 9

JavaScript Ajax:
What is AJAX?

Answer 9

it is a technique for loading data into part of a page without having to refresh the entire page

Question 10

JavaScript Ajax:
What does the AJAX acronym stand for?

Answer 10

Asynchronous JavaScript and XML

Question 11

JavaScript Ajax:
which object is built into the browser for making HTTP requests in JavaScript?

Answer 11

XMLHttpRequest() object

Question 12

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

Answer 12

‘load’

Question 13

JavaScript Ajax:
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

they’re both objects so they can use the prototype methods (addEventListener)