Answer:
Replace the NIC
Step-by-step explanation:
A node needs a network connectivity to perform and function well as part of a cluster. If a single network interface is available, the breakdown of the other network interfaces will not cause service interruption but will most likely cause service degradation.
Simple ways to know if you need to change your NIC is to go Click Start and the you right-click on Computer, then you toggle over and click Properties, it will bring a window box and From there, click Device manager. Screen the window to where it says "Network adapters". If there's a question mark or an exclamation there, then you have an ethernet problem that needs troubleshooting; if not then you're OK.