The DCE device in a serial connection is responsible for what function?

In a serial connection, the DCE (Data Communication Equipment) device plays a specific role, and one of its primary responsibilities is to configure the clock rate. The clock rate determines the speed at which data is transmitted over the serial link. This function is essential because both the DCE and DTE (Data Terminal Equipment) devices must operate at the same speed for effective communication to occur.

The DCE typically provides the timing mechanism for the communication, which is crucial when setting up a serial link, especially in environments where synchronization is paramount. For instance, in scenarios where the DCE is a modem connected to a router, the clock rate provided by the DCE allows the router (the DTE) to communicate correctly over the serial connection.

Other options regarding sending or receiving data do not highlight the specific function of configuring the clock rate, which is a key aspect of DCE's responsibilities and distinguishes it from the data transmission aspects associated with DTE devices.