Which two commands allow you to return to a previous version of software on the device?（）A、request system software addB、request system software downgradeC、request system software replaceD、request system software rollback
Which two commands allow you to return to a previous version of software on the device?（）
- A、request system software add
- B、request system software downgrade
- C、request system software replace
- D、request system software rollback
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