Which HP B-series SAN Switch feature enables the direct connection of servers to any SAN fabric?

Access Gateway uses NPIV (N_Port ID Virtualization) to map server-facing F_Ports to fabric-facing N_Ports, allowing servers to attach to any SAN fabric without the switch participating in fabric services like FSPF routing or zoning enforcement. This simplifies connectivity and removes the need for ISL licensing when connecting to heterogeneous fabrics.

Server Application Optimization (SAO) is a feature set for tuning SAN traffic patterns and Quality of Service for specific application workloads, not for enabling direct server-to-fabric connectivity.

Extended Fabric is a feature that extends the physical distance between Fibre Channel switches beyond standard limits using long-wave optics and buffer credits, not a server connection method.

Adaptive Networking refers to congestion management and flow control mechanisms within the fabric to prevent performance degradation, unrelated to server attachment topology.