Final answer:
DSL is the correct answer, as it is not a wireless technology but rather a wired one using telephone lines, unlike Infrared, 802.11n, and Bluetooth which are wireless.
Step-by-step explanation:
The question asks which option is not an example of wireless networking communications. DSL, or Digital Subscriber Line, does not use wireless technology to provide an internet connection. Instead, it operates through wired connections using telephone lines. On the other hand, Infrared, 802.11n (a Wi-Fi standard), and Bluetooth are all examples of wireless technology. Infrared is used for remote controls, Wi-Fi (802.11n) provides wireless internet connections, and Bluetooth allows for short-range communication between devices.