What mode allows users to print on both sides of paper without needing to manually flip the paper?

Duplex mode is the printing setting that enables a printer to automatically print on both sides of a sheet of paper. This feature reduces paper consumption and supports more efficient document printing. When duplex mode is activated, the printer knows how to handle the feeding of the paper so that it can print on one side, then flip the paper over and print on the reverse side without user intervention.

This capability is particularly advantageous in both office and home environments where sustainability practices are encouraged, as it helps minimize waste. It can significantly streamline tasks involving double-sided documents, saving time and effort compared to manually flipping the paper for printing on the other side.

While other options can relate to different aspects of printing, they do not pertain to double-sided printing. A print server is a network component used for managing print tasks, portrait mode refers to vertical page orientation, and landscape mode refers to horizontal page orientation, none of which involve the duplex printing functionality.