Mobile technology is exactly what the name indicates – technology that is portable; it refers to any device that you can carry with you to perform a wide variety of “tasks”. It is technology that allows those tasks to be performed via cellular phone, PDA, vehicles, laptops, etc.
In a telephone network, the caller is connected to the person they want to talk to by switches at various telephone exchanges.
In a broadcast system, the central high-powered broadcast tower transmits a high-frequency electromagnetic wave to numerous low-powered receivers
As the Internet grew in popularity and its traffic was required to be routed into private networks, the TCP/IP protocols replaced existing LAN technologies.
The Internet is a worldwide network of computers and computer networks that communicate with each other using the Internet Protocol (IP).