What characterizes a wireless network?

A wireless network is characterized by its ability to connect devices without the need for physical cables. This is achieved through the use of radio waves or infrared signals, allowing for greater flexibility and mobility for users. Devices such as laptops, smartphones, and tablets can connect to the network as long as they are within the range of the wireless access point.

The other choices suggest characteristics that apply to different types of networks. For instance, using cables for connection directly contradicts the fundamental nature of a wireless network, while transferring data through fiber optics pertains specifically to wired networks. Limiting connections to local devices does not encompass the broader capabilities of wireless networks, which can facilitate connections over much larger areas, including remote access and wide-area networking. Therefore, the correct answer truly reflects the defining feature of wireless networks.