1. An apparatus comprising: a loopback module configured to receive a first copy of a target vector during a clock cycle, the target vector including a quantity of set bit values and being defined based on a portion of data to be transmitted via a switch fabric, the loopback module configured to define a loopback vector that has a quantity of set bit values less than a quantity of set bit values included in the first copy of the target vector; and an index module configured to receive a second copy of the target vector during the clock cycle, the index module configured to define during the clock cycle an index vector based on the second copy of the target vector, the index vector being configured to trigger an element associated with the switch fabric to process the data.