Bluetooth
Bluetooth networks often operate as a single connection, or a Bluetooth network may involve many devices. Bluetooth also allows for a scheme known as Bluetooth pairing where devices can quickly associate. The Bluetooth specification defines a variety of forms of Bluetooth network connection that may be set up. In this way Bluetooth networking is a particularly flexible form of wireless system for use in a variety of short range applications.
3G/4G
3G means ’3rd Generation’ of wireless connection standards. For mobile phone users, it means the higher speed connection that allows video calls and watching mobile television and video, in addition to services available in the previous standards
Using 4G you will expect 30 times faster connection than 3G, depending on coverage. 4G and WiFi have almost the same bandwidth. The difference between them is in range. WiFi is targeted to cover low range networks, while 4G was designed to replace high range mobile networks
Wireless
A wireless device can refer to any kind of communications equipment that does not require a physical wire for relaying information to another device. Wireless headphones fitted with a receiver use either radio frequency or infrared technology to communicate with a transmitter that is connected to the sound source, say a television. In most cases, however, when someone refers to a wireless device, they are speaking of a networking device that can pass data to other wireless network gear without being physically connected.
NIC
A Network Interface Card is a device that allows computers to be joined together in a network, typically a local area network. Networked computers communicate with each other using a particular protocol or agreed-upon language for transmitting data packets between the different machines. The network interface card acts as an interpreter, allowing the machine to both send and receive data on a LAN.
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