A zoom lens includes, from the object side, a positionally-fixed first lens group having a positive refracting power, a second lens group having a negative refracting power and movable in an optical axis direction for zooming, a third lens group having a positive refracting power, and a fourth lens group movable in the optical axis direction. Network traffic patterns are monitored including the amount of data received and transmitted by the network processing device. The method further comprises creating a fin pattern mask on the layer of the second semiconductor material and anisotropically etching the layer of the second semiconductor material and the layer of the first semiconductor material using the fin pattern mask as an etch mask. A signal is transmitted to cause the valve actuator and to allow the engine valve to return to the first position. The device further includes a surface-emitting distributed feedback laser that is mounted on and attached to the body and positioned to inject laser light into the waveguide. When the key information added to the access ticket and the key information included in the data request are the same, the gateway device transfers the data request to a data server device.