This process is broken down into seven layers; Application Layer, Presentation Layer, Session Layer, Transport Layer, Network Layer, Data Link Layer, and Physical Layer. When a person communicates to another person on a network the information passes through these layers.
Ptolemy was an astronomer and mathematician. He believed that the Earth was the center of the Universe. The word for earth in Greek is geo, so we call this idea a geocentric theory.
The geocentric theory was the model that the earth is at the center of the universe, and everything (sun, stars,moon,ect.) revolve around it daily. It was disproven about 500 â¦ years ago by Copernipus in favor of the heliocentric model which said that the earth went around the sun.eo means earth, and centric means centered.. The geocentric view is therefore the earth centered view. The word typically refers to the view of the earth as the ce â¦ nter of the universe. The earth is the center of human interest. Beyond that the earth/moon system isn't the center of anything.