Which of the following expansion cards should be installed in a server to allow the server to connect to a SAN via a fiber channel?
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A. B. C. D.D.
The correct answer is D. HBA (Host Bus Adapter).
Explanation: A SAN (Storage Area Network) is a specialized network that allows servers to access high-speed storage devices. A Fiber Channel is a protocol used for connecting devices in a SAN. In order for a server to connect to a SAN via a Fiber Channel, it needs a special adapter card called an HBA (Host Bus Adapter).
An HBA is a specialized expansion card that connects a server to a SAN via a Fiber Channel. It provides a dedicated interface between the server and the SAN and allows for high-speed data transfer. An HBA is also responsible for handling the protocol conversion between the Fiber Channel protocol used by the SAN and the server's native protocol.
The other expansion cards mentioned in the question (SATA, iSCSI, and SCSI) are not suitable for connecting a server to a SAN via a Fiber Channel.
SATA (Serial ATA) is a standard used for connecting storage devices, such as hard drives and solid-state drives, to a computer's motherboard. It is not used for connecting a server to a SAN via a Fiber Channel.
iSCSI (Internet Small Computer System Interface) is a protocol used for transmitting SCSI commands over an IP network. It is a popular alternative to Fiber Channel for connecting servers to a SAN. However, it requires a different type of adapter than an HBA.
SCSI (Small Computer System Interface) is a legacy protocol used for connecting storage devices to a computer's motherboard. It is not used for connecting a server to a SAN via a Fiber Channel.
Therefore, the correct answer is D. HBA (Host Bus Adapter).