A is true, so it is not selected.Huawei training material states thatDTOE 1.0 uses polling mode to reduce latency.
B is true, so it is not selected.Huawei training material states that thehardware queue is operated in user mode, which helpsavoid context-switching overhead.
C is false, so it must be selected.The same Huawei material explains that DTOE 1.0 is designed toeliminatetraditional overheads such askernel-mode interrupts, locks, system calls, and thread switching. Therefore, saying that these high-latency overheads still exist is incorrect.
D is false, so it must be selected.Huawei material lists the traditional problem that theCPU must spend great resources processing each MAC frameas a challenge of the conventional approach. DTOE 1.0 addresses this by offloading processing, so saying DTOE 1.0 still requires the CPU to process each MAC frame is incorrect.

The SmartMigration feature in Huawei OceanStor Pacific enables data migration between storage resources. The *HCIP-Storage V5.5 Training Material (Module 4: Storage Design and Implementation)* explains: "The split mode and migration rate of a SmartMigration task can be modified only when the task is in certain statuses, such as Interrupted, Paused, or Faulty. When the task is in the Migrating status, changes to split mode or migration rate are not allowed, as the system is actively transferring data." This is because modifying parameters during active migration could disrupt the process or cause data inconsistency. Let's evaluate:
- Option A: Interrupted allows changes, as the task is stopped.
- Option B: Paused allows changes, as the task is temporarily halted.
- Option C: Faulty allows changes, as the task is not actively running.
- Option D: Migrating does not allow changes, as the task is in progress.
Thus, option D is the status that prevents changes.
Reference:
HCIP-Storage V5.5 Training Material, Module 4: Storage Design and Implementation, Section 4.4: SmartMigration Management and Configuration*, Huawei Technologies Co., Ltd.
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