To ensure that an NIC failure does not prevent your company's public website from being accessible on the internet, you should implement Ethernet bonding. Ethernet bonding, also known as network interface bonding or NIC teaming, is a technique that allows multiple network interfaces to be combined into a single logical interface, providing redundancy and increased throughput.
In Ethernet bonding, two or more network interfaces are connected to the same switch or switches, and the switch or switches are configured to treat the interfaces as a single logical interface. This allows the network traffic to be distributed across multiple interfaces, providing redundancy in case one of the interfaces fails. If one of the NICs fails, the other NICs in the bond will continue to handle traffic, ensuring that the website remains accessible.
Spanning tree, traffic shaping, and QoS are not solutions that specifically address NIC failure redundancy. Spanning tree is a protocol used to prevent loops in network topologies. Traffic shaping and QoS are techniques used to prioritize or limit network traffic to ensure that certain types of traffic receive priority over others, but they do not provide redundancy in case of NIC failure.