Methods and systems for performing classification of packets utilize processes such as protocol recognition, state-based inspection, decision-making, traffic aggregation, classification events, efficiency in resource utilization, scalability and redundancy. In one embodiment of the invention, a hydraulic control assembly includes a tubular member in the form of tubing, which carries axial chambers, each coupled to a downhole tool and carrying a flow controlling shuttle valve and a gear rod. The device also includes an epitaxial layer formed over portions of the fin, the epitaxial layer being included between the fin and the spacer. Alternatively, the phase shift structure may be made a relief structure formed by forming a dielectric transparent film on the surface of the substrate through which light passes to random thicknesses.