A biosensor that is capable of measuring a material contained in a sample is provided. A network node in a BVLAN receives IS-IS protocol packets sent by other network nodes in the BVLAN; determines its own priority in the BVLAN; transmits uniform configuration information in the BVLAN according to its own priority, where the uniform configuration information is information that needs to be configured on each network node in the BVLAN. Upon insertion of an elongated tool shaft having a polygonal cross section into the bore so that a groove in the tool shaft is aligned with the first detent, the first detent engages the groove and axially retains the tool shaft. An ADC designed in accordance with the techniques described herein utilizes a quantizer that has a lower resolution than a digital-to-analog converter used for negative feedback. Connector members are secured to the outer ends of the first and second frame members to enable them to be removably connected respectively by flexible straps or the like to the adjacent portions of the goal cross bar and the goal upright post to define the target area.