Zigbee is a standards-based wireless technology developed to enable low-cost, low-power wireless machine-to-machine (M2M) and internet of things (IoT) networks. This wireless network diagram sample depicts office WLAN. "A wireless local area network (WLAN) is a wireless computer network that links two or more devices using a wireless distribution method (often spread-spectrum or OFDM radio) within a limited area such as a home, school, computer laboratory, or office building. The IEEE 802.11 standard for wireless local area networking (WLAN), commercially known as Wi-Fi, has become a necessity in our day-to-day life. Over a billion Wi-Fi access points connect close to hundred billion of IoT devices, smart phones, tablets, laptops, desktops, smart TVs, video cameras, monitors, printers, and other consumer devices to the Internet to enable millions of applications to Bluetooth is one of the most commonly used network connectivity methods in use today. Bluetooth is a proprietary networking standard used for short range wireless connectivity and is often used to connect peripherals to base devices. For example, you may have a Microsoft Xbox at home with “wireless” controllers. เครือข่ายไร้สายระยะบุคคล (WPAN) คือเครือข่ายพื้นที่ส่วนบุคคล - เครือข่ายสำหรับอุปกรณ์เชื่อมต่อศูนย์กลางรอบพื้นที่ทำงานของ Wireless networks Access computing/communication services, on the move Wireless WANs – Cellular Networks: GSM, GPRS, CDMA – Satellite Networks: Iridium Wireless LANs – WiFi Networks: 802.11 – Personal Area Networks: Bluetooth Wireless MANs – WiMaX Networks: 802.16 – Mesh Networks: Multi­hop WiFi Bluetooth 4.1 is a wireless technology that facilitates short-range wireless communication between devices such as personal computers, laptops, cellular phones, tablets, and gaming consoles, thus creating a wireless personal area network (WPAN). Bluetooth technology is used primarily to establish wireless personal area networks (WPAN), commonly referred to as ad hoc or peer-to-peer (P2P) networks. Bluetooth is a low-cost, low-power technology that provides a mechanism for creating small wireless networks on an ad hoc basis, known as piconets. A piconet is composed of two or more QExHHAT.