Which of these protocols carries commands for reading from/writing to storage over a TCP/IP session?

Question

Options

• ARDMA
• BiSCSI
• CNVMeoF-RDMA
• DFCoE

• B
  89% (16)
• C
  6% (1)
• D
  6% (1)

Explanation

iSCSI (Internet Small Computer Systems Interface) is the correct answer because it is specifically designed to encapsulate SCSI storage commands - reads, writes, and other block-level operations - inside TCP/IP packets, allowing standard IP networks to carry storage traffic.

Why the distractors are wrong:

• RDMA (A) is a memory-access transport mechanism that bypasses the CPU and OS; it typically runs over InfiniBand or RoCE, not a TCP/IP session, and is not itself a storage command protocol.
• NVMeoF-RDMA (C) uses RDMA as its fabric transport - meaning it deliberately avoids TCP/IP in favor of lower-latency RDMA links; it's a distinct technology from iSCSI.
• FCoE (D) encapsulates Fibre Channel frames over Ethernet at Layer 2, but it does not use the TCP/IP stack - it bypasses IP entirely.

Memory tip: Break down the name - iSCSI = Internet SCSI. The "i" signals TCP/IP (the Internet protocol suite), and "SCSI" is the classic command set for storage I/O. If you see "TCP/IP + storage commands," think internet SCSI.

No community discussion yet for this question.