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What does a Line-interactive UPS provide beyond standard UPS capabilities?

  1. Battery backup only

  2. AC surges and sags moderation

  3. Data encryption

  4. Network connectivity

The correct answer is: AC surges and sags moderation

Line-interactive UPS provides not only battery backup, but also AC surges and sags moderation. AC surges and sags moderation is important in protecting electronic devices from power fluctuations and preventing damage to equipment. Option A, battery backup only, does not account for the added protection against power fluctuations. Options C and D are incorrect as they do not specifically address the capabilities of a UPS. A Line-interactive UPS does not provide data encryption, as this is not a function of a UPS. Similarly, network connectivity is not a feature of a UPS and is therefore not provided by a Line-interactive UPS.