An administrator is configuring external storage that will be accessed by multiple servers via the existing Ethernet at a minimum cost. Which of the following technologies BEST meets these objectives?

NFS operates over standard Ethernet using TCP/IP, requiring no additional hardware beyond what is already present. It natively supports concurrent access from multiple servers and is open-source or built into most operating systems, minimizing cost. This directly satisfies both the shared-access and minimum-cost requirements.

Fibre Channel requires dedicated FC switches, HBAs, and cabling separate from Ethernet, making it significantly more expensive and not leveraging existing infrastructure.

An HBA fabric is the hardware and switch infrastructure used with Fibre Channel, which requires specialized and costly components beyond standard Ethernet.

DAS (Direct-Attached Storage) connects storage directly to a single server and cannot be shared across multiple servers over a network.