A bumper with an attachment member to be made thereon for the purpose of mounting the bumper onto longitudinal beams of a vehicle, is such that section walls acting as compressive and tensile struts and a pair of flanking walls joining them form a hollow section. The bid associated with the highest pseudo bid is identified as the winning bid. The body also has an opening communicating with the interior of said building, an opening communicating with the exterior of the building and a third opening communicating with the air space. The mounting track defines a cavity and an opening. The network device selects the hardware address of a plurality of hardware addresses assigned to the network interface based on the index value.