Which device can create a wireless network segment within a pre-existing wired network?

An access point is specifically designed to create a wireless network segment within a pre-existing wired network. It connects to the wired network, allowing devices equipped with wireless capabilities, such as laptops and smartphones, to connect to the network wirelessly. This function is essential in environments where wired connections are limited or impractical, as it enables broader access and mobility for users.

Access points serve as a bridge between the wired network and wireless clients, transmitting data over radio frequencies. When connected to the wired network, they can expand the network's reach and capabilities, allowing multiple wireless devices to communicate with each other and access resources on the wired network.

In contrast, although routers can also serve wireless functions, they primarily route data between different networks rather than creating a segment within an existing wired network. Network interface cards are responsible for connecting devices to a network, but they do not facilitate the creation of a wireless segment. Modems, mainly used to connect a network to the internet, do not create wireless networks themselves but may work with a router or access point to facilitate wireless connectivity.