Final answer:
Yes, a NIC can be inserted into an expansion slot on the computer's motherboard. Internal NICs are inserted into PCI or PCIe slots, while external NICs connect through USB ports. Wireless NICs provide wireless network connectivity.
Step-by-step explanation:
Yes, a NIC (Network Interface Card) can be inserted into an expansion slot on the computer's motherboard. Internal NICs are often inserted into PCI or PCIe slots on the motherboard to provide wired network connectivity. External NICs, on the other hand, connect to the computer through USB ports. USB NICs allow you to add network connectivity to a computer without an available expansion slot. Wireless NICs enable wireless network connectivity and are typically installed internally or connected externally through a USB port.