In a server cluster, what does a teamed interface refer to?

A teamed interface refers to link aggregation, which involves combining multiple network interfaces into a single logical interface. This combination increases the bandwidth and provides redundancy in network connectivity. If one of the network links fails, the system can continue to operate using the remaining links, thereby enhancing network reliability and performance.

Link aggregation is especially beneficial in server clusters where high availability and increased throughput are critical. By grouping multiple physical network connections, a server can effectively balance the load across them, improve redundancy, and maximize data transfer speeds, all of which are essential for maintaining optimal cluster performance.

The other options do not accurately describe teamed interfaces as they pertain to different concepts. Elasticity on demand relates to the ability of cloud resources to scale up or down based on current needs, which does not involve network connectivity. TCP offload engine is a technology that offloads TCP/IP processing from the CPU to a dedicated network interface card, improving performance but not directly related to the concept of link aggregation. Resource pooling is a cloud computing principle that refers to the allocation of shared resources to multiple consumers but does not specifically describe the teaming of interfaces.