What is the difference between REST and HTTP protocols?

Question

What is the REST protocol and what does it differ from HTTP protocol ?

Answer 1

REST is not a protocol, it is a way of exposing your application, mostly done over HTTP.

for example, you want to expose an api of your application that does getClientById
instead of creating a URL

yourapi.com/getClientById?id=4
you can do
yourapi.com/clients/id/4

since you are using a GET method it means that you want to GET data

You take advantage over the HTTP methods: GET/DELETE/PUT
yourapi.com/clients/id/4 can also deal with delete, if you send a delete method and not GET, meaning that you want to dekete the record