What type of networking standard is used for wireless internet access in libraries?

The choice of 802.11 as the correct answer relates to its designation as the standard for wireless local area networks (WLAN). Specifically, 802.11 encompasses various protocols that allow devices to connect to the internet without the need for physical cables, making it ideal for environments such as libraries where flexibility and mobility are essential for users accessing online resources.

In libraries, providing wireless internet access using the 802.11 standard enables patrons to connect their laptops, tablets, and smartphones seamlessly throughout the space. This standard supports various frequencies and bandwidths, allowing for different levels of performance depending on the needs of the users and the layout of the library itself.

Other options, while related to networking or communication, serve different purposes. Bluetooth is designed for short-range communication between devices and is typically used for connecting peripherals, not for broader internet access. Ethernet is a wired standard, suitable for connecting devices within a local area network but does not provide the wireless capability that libraries require for flexible internet access. Finally, 4G LTE is a mobile wireless communication standard aimed primarily at cellular networks, which is not generally utilized within the confines of a library setting for internal wireless internet connectivity.