Автор работы: Пользователь скрыл имя, 27 Марта 2013 в 10:19, доклад
The Telegraph
Invented in the 1840s.
Signals sent over wires that were established over vast distances
Used extensively by the U.S. Government during the American Civil War, 1861 - 1865
Morse Code was dots and dashes, or short signals and long signals
The electronic signal standard of +/- 15 v. is still used in network interface cards today
Internet History
Internet Evolution
Internet grown UP