HTTP

Question 1

What is a client?

Answer 1

A piece of computer hardware or software that accesses a service made available by a ‘server’ by sending requests as part of the client-server model of computer networks

Question 2

What is a server?

Answer 2

A piece of computer hardware or software that provides functionality, such as sharing data or resources among multiple clients or performing computations, for other programs or devices, called ‘clients’.

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 HTTPrequestmessage?

Answer 4

An HTTP method - GET, PUT, POST, HEAD, OPTIONS
The request target - usually a URL or the absolute path of the protocol, port, and domain are usually characterized by the request context
The HTTP version - defines the structure of the remaining message

Question 5

What three things are on the start-line of an HTTPresponsemessage?

Answer 5

The HTTP version
A status code
A status text

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. An HTTP header consists of its case-insensitive name followed by a colon (:), then by its value.

HTTP headers is a field of an HTTP request of response that passes additional context and metadata about the request or response

Question 7

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

Answer 7

Not all requests have one: requests fetching resources, like GET, HEAD, DELETE, or OPTIONS, usually don’t need one.

Question 8

What is the difference between the internet and the web?

Answer 8

The internet is the network of connected computers, the web uses HTTP protocols to link between URLs.

The Internet is a global network of networks while the Web, also referred formally as World Wide Web (www) is a collection of information that is accessed via the Internet. Another way to look at this difference is; the Internet is infrastructure while the Web is served on top of that infrastructure. Alternatively, the Internet can be viewed as a big book store while the Web can be viewed as a collection of books on that store. At a high level, we can even think of the Internet as hardware and the Web as software!