A network administrator is tasked with setting up zoning for a SAN infrastructure. What hardware should be implemented for redundancy?

Implementing multiple HBAs (Host Bus Adapters) is crucial for establishing redundancy in a SAN (Storage Area Network) infrastructure. HBAs serve as the interface between the servers and the storage, and by using multiple HBAs in a system, you can ensure that if one HBA fails, the other can take over without any loss of connectivity or access to the storage resources. This redundancy enhances the reliability and availability of the SAN, which is essential for maintaining continuous access to critical data in an enterprise environment.

Additionally, using multiple HBAs allows for load balancing across the physical connections, potentially improving performance and reducing bottlenecks. In a SAN setup, where high availability is key, this redundancy minimizes the single points of failure that can disrupt access to storage resources.

In contrast, while multiple VLANs, host nodes, and routers can contribute to a robust network infrastructure, they do not specifically focus on the redundancy of connections to the storage system. VLANs primarily manage network traffic, host nodes provide processing power, and multiple routers can help with routing and switch redundancy but are not directly involved in storage connectivity.