Wireless Technologies無線技術

A personal area network (PAN) is a network that exists within a relatively small area and connects electronic devices such as desktop computers, printers, scanners, fax machines, and notebook computers. In the past, connecting these devices required extensive cabling, connectors, and adapters. Now, these devices typically use Bluetooth to connect to the WPAN.

個人區域網路（PAN）是存在於相對較小範圍內的網路，用來連接桌上型電腦、印表機、掃描器、傳真機及筆記型電腦等電子裝置。過去要連接這些裝置，需要大量的纜線、接頭及轉接器。現在，這些裝置通常使用藍牙（Bluetooth）連接到 WPAN。

Typical applications for WPANs are in the office environment. WPAN there enables communication between devices in proximity (within several meters of each other) to communicate as if they were connected by a cable.

WPAN 的典型應用場景是辦公室環境。在這種環境中，WPAN 可讓鄰近（相距數公尺以內）的裝置彼此通訊，效果就如同以纜線連接一般。

In contrast to WPANs, WLANs provide more robust wireless network connectivity over a local area, up to approximately 100 m (328 feet) between an AP and associated clients. The goal is not to connect one device to another but to connect end devices to the backbone network (typically a wired LAN) without the need for cables. WLANs today are based on the IEEE 802.11 standard and are referred to as Wi-Fi networks. Because these networks are common, a wireless network administrator needs to understand how they work and how to configure and troubleshoot them.

與 WPAN 不同，WLAN 可在本地區域內提供更強健的無線網路連線，AP 與相關用戶端之間的距離最遠可達約 100 公尺（328 英尺）。其目標不是將一個裝置連接到另一個裝置，而是讓終端裝置不需使用纜線即可連接到骨幹網路（通常是有線 LAN）。目前的 WLAN 是以 IEEE 802.11 標準為基礎，通稱為 Wi-Fi 網路。由於這類網路相當普遍，無線網路管理員需要了解其運作方式，並具備設定與疑難排解的能力。

A WMAN is a wireless communications network that covers a large geographic area, such as a city or a suburb. In this type of area, the wireless signal often provides a point-to-point or point-to-multipoint backbone. Wireless can be used to create links at a low cost: organizations need only two end devices that point at each other instead of a complex and costly wired infrastructure.

WMAN 是一種涵蓋大範圍地理區域（例如一座城市或郊區）的無線通訊網路。在這類區域中，無線訊號通常會提供點對點或點對多點的骨幹連線。使用無線技術可以低成本建立連結：組織只需要兩台彼此對準的終端裝置，而不需要複雜且昂貴的有線基礎架構。