Final answer:
Internal network adapters, also known as network interface cards (NICs), allow a device to connect to various types of networks. They are typically installed on a computer's motherboard or as an expansion card.
Step-by-step explanation:
Network adapters that are installed internally in a device are commonly referred to as internal network adapters or network interface cards (NICs). These adapters allow a computer or other device to connect to a network, including local area networks (LANs), wide area networks (WANs), or the Internet. Typically, an internal network adapter is installed on the motherboard of a computer or can be added as an expansion card that fits into a compatible slot on the motherboard.