What function do the NIC lights serve when connected to a network?

The lights on a Network Interface Card (NIC) serve as important indicators for the operational status and speed of the connection. When a NIC is properly connected to a network, these lights provide valuable information; typically, a green light indicates that the NIC is operational and has established a link with the network. In many cases, a blinking light signifies data activity, indicating that the NIC is transmitting or receiving data packets. This functionality allows users and network administrators to quickly assess the health of the network connection without needing to delve into software diagnostics.

The relevance of this function is crucial in troubleshooting network issues or ensuring that the device is communicating with other networked devices effectively. Understanding the state of a NIC through these indicators can significantly aid in maintaining a stable and efficient networking environment.