Technology of Modern CommunicationText A: BluetoothBluetooth wireless technology is a short-range communications technology intended to replace the cables connecting portable(轻便的) and fixed devices while maintaining high levels of security.The key features of Bluetooth technology are robustness(稳健), low power, and low cost .The Bluetooth specification defines a uniform structure for a wide range of devices to connect and communicate with each other.蓝牙无线技术是一种小范围无线通信技术,旨在保持高安全级的基础上,在便携式