The major differences between 3G and 4G technology used in wireless telephones and similar devices basically revolve around the amount of data that can be reliably sent through the networks these devices are a part of and how that data is sent. Ultimately, these differences will be established as 4G technologies continue to be developed and utilized. As of late 2010, there is still a great deal of debate and competition regarding the way in which 4G technology will be deployed.
WIreless/Bluetooth
Bluetooth is the name of a wireless technology standard for connecting devices that is set to replace cables. It uses radio frequencies in the 2.45 GHz range to transmit information over short distances of generally 33 feet or less. Wireless Internet access, sometimes referred to as a "hot spot," is a local area network (LAN) run by radio waves rather than wires. Wireless Internet access is broadcast from a central hub, which is a hard-wired device that actually brings in the Internet connection.
Network Interface Cards
A network interface card, more commonly referred to as a NIC, is a device that allows computers to be joined together in a LAN, or local area network. Networked computers communicate with each other using a given protocol or agreed-upon language for transmitting data packets between the different machines, known as nodes. The network interface card acts as the liaison for the machine to both send and receive data on the LAN.
