I have learned it but I forget, can you guys help me? plsssssssssssssss.
A request is a message sent to the server asking for a given resource. It may involve some server side code intercepting the request and pre-processing the document that will be sent back to the client. But, it may also just be a fetching operation to locate and send back a static page.
A URL is how we request a resource from the server.
The last portion of the URL is the name of the resource, all the rest is the path to that resource (namely, the containing folder, which in this case is the Site Root).