Network Requests

Question 1

What is a client?

Answer 1

A service requester

Question 2

What is a server?

Answer 2

A service provider

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

The method, the request target, the version

Question 5

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

Answer 5

The protocol version, the status code, the status text

Question 6

What are HTTP headers?

Answer 6

Information located at the top of a response that lets the server and client process additional information about the request

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

Asynchronous JavaScript and XML

It is a programming practice of building dynamic webpages using XML Requests to update the DOM and HTML without needing to refresh the page

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

They both share the same prototype

Question 14

What is a client?

Answer 14

Something that requests a service

Question 15

What is a server?

Answer 15

A service provider program

Question 16

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

Answer 16

GET

Question 17

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

Answer 17

HTTP method, target, and HTTP version

Question 18

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

Answer 18

Protocol version, status code, and status text

Question 19

What are HTTP headers?

Answer 19

Strings/key value pairs that contain metadata

Question 20

Is a body required for a valid HTTP message?

Answer 20

No, body is optional

Question 21

What does fetch() return?

Answer 21

a promise

Question 22

What is the default request method used by fetch()?

Answer 22

GET

Question 23

How do you specify the request method (GET, POST, etc.) when calling fetch?

Answer 23

fetch(‘URL’, {
method: ‘GET’, ‘POST’, etc }
);

Question 24

Is fetch a javascript function?

Answer 24

No, it is strictly browser supported

The Fetch Standard