Which device is NOT typically found in a home network setup?

In a typical home network setup, a power adapter is not considered a networking device. It primarily serves the purpose of providing power to other devices, such as routers, modems, or switches. Networking devices like a modem, hub, or repeater are specifically designed to facilitate data communication and connectivity within the network.

A modem connects your home network to the internet service provider, enabling internet access. A hub acts as a central connection point for multiple devices in a local area network (LAN), allowing communication between them. A repeater is used to extend the range of a network signal, boosting connectivity in larger areas or in homes with thick walls that might block signals.

While a power adapter is essential for powering these networking devices, it does not function in data transmission or network management, thereby making it the answer that does not belong in the context of networking equipment.