Messages are being transferred using the simple mail transfer protocol (SMTP)

Example:
AMAZON

World Wide Web is a system of interlinked, hypertext documents accessed through the internet. It is controled mainly by HTTP protocol 

File sharing is a technology that allows any networked computer to copy files located on other computers (domain owners).

ex: google drive

IM is real-time text transmission with the use of internet technologies. It allows people to communicate with each other in different chat forums.

ex: messenger

 GC is a computer network in which each computer's resources (processing power, memory) are shared with every other computer in the system. 

ex: seti@home

Voice over Internet Protocol is a method and group of technologies for the delivery of voice communications and multimedia sessions over IP networks, such as the Internet.

ex: facetime