The internet is based on the following three key technologies:
a. tcp/ip, http, and packet switching.
b. client/server computing, packet switching, and the development of widely used communications standards for linking networks and computers.
c. client/server computing, packet switching, and http.
d. tcp/ip, html, and http.

[A] TCP/IP, HTTP and Packet Switching

Transfer Control Protocol and Internet Protocol are the standard protocols which are used when transferring data over a network, and that data arriving to the correct destination.

Hypertext Transfer Protocol, and covers how data travels over the world wide web, such as text, images and videos.

Packet Switching, and covers how data travels across the internet after they have been broken in the small data packets of information, so that they can be reassembled when they reach he destination.

The steeply sloping region of a continental margin where the sea floor descends at a rate of greater than 1 ft for every 40 feet is called. continental slope.