Which of the following statements regarding network maintenance work are true? (Choose two.)
A) For device software maintenance, onsite operations are allowed but only remote operations are recommended.
B) The device software running is closely related to services running on the device.
C) The external environment where hardware runs does not need special attention.
D) For device environment maintenance, maintenance personnel need to go to the site or even use some professional tools for observation and measurement.
Correct Answer:
Verified
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