For the OoeanStor Dorado NAS, when receiving client data, the DTOE mode implements one less memory copying than the TCP mode does, thereby delivering higher performance.

Question

Options

• ATRUE
• BALSE

• A
  71% (15)
• B
  29% (6)

Explanation

Option A is correct because DTOE (Direct TCP Offload Engine) offloads TCP/IP processing to dedicated hardware on the network adapter, allowing data to be placed directly into the target memory location without passing through an intermediate kernel buffer. Standard TCP mode requires two memory copies - one from the NIC buffer to the kernel buffer, and another from the kernel buffer to the application buffer - whereas DTOE mode eliminates the intermediate kernel copy, resulting in one fewer memory copy and therefore higher throughput and lower CPU overhead.

Option B is wrong simply because it is the negation of a factually accurate statement; the one-fewer-copy behavior of DTOE over TCP is an established design characteristic of this architecture.

Memory tip: Think of "offload" in DTOE as offloading not only the TCP processing from the CPU but also offloading one memory copy from the data path - fewer copies means less work, which equals higher performance.

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