Internet Email Addresses
The Local part is the name of a special file stored on the mail server called the user’s mailbox.
The Domain name is resolved using DNS.
The mail server is also known as a mail exchanger.
Hypertext Transfer Protocol (HTTP)
HTTP is the protocol used to access resources on the World Wide Web.
A browser application is used to send a request to the WWW server for a resource, e.g. a web page, graphics file, audio file, etc.
The server responds by sending the resource (a file) to the client and closing the connection.