Which of the following is an example of Data Terminal Equipment?

Data Terminal Equipment (DTE) refers to devices that are the endpoints of a communication network, typically serving as either a source or destination of information. In this context, printers are classified as Data Terminal Equipment because they receive data from a computer or network in order to produce physical output, such as printed documents.

Considering the other options: modems act as a bridge between the digital and analog worlds, processing data as it is sent to and from a network, which places them in a different category known as Data Communication Equipment (DCE). Routers are devices that manage data traffic between multiple networks, rather than serving as end terminals. Network switches primarily facilitate communication within a local area network (LAN) and operate at a different layer in the network model, focusing on directing data packets to the correct destinations rather than simply receiving or printing data.

Therefore, in this selection, printers distinctly qualify as Data Terminal Equipment, as they directly interact with the data being transmitted and fulfill a terminal function within a network.