Today, cables connect all continents and are still a main hub of telecommunications. Alexander Graham Bell Exhibits. Telephones exchanges provide the backbone of Internet connections today. Modems provide Digital to Audio conversions to allow computers to connect over the telephone network. The start of global telecommunications.
Satellites play an important role in transmitting all sorts of data today.
As we will see later the Internet relies on packets to transfer data. Data is split into tiny packets that may take different routes to a destination. Hard to eavesdrop on messages. We will study how to use and send E-mail shortly in this course. You will make extensive use of E-mail for the rest of your life.