A method and a network device are provided to transmit network packets through a network security device. The second field is handled as one subfield, for example, for storing an index address, and the fourth field is divided into two subfields for storing an index address in one and a line address in the other. In one implementation the semantic objects correspond to peoples’ names and the first and second representations or views correspond to two different languages. Reinforcing rib structure operates to resist flexure between the arms, bracket, and base. The compartments include door assemblies for closing the doorways and creating enclosed spaces and chair and other furniture interactively arranged in the compartment.