A cryogenic hydraulic reciprocating piston pump includes a casing which defines a piston chamber. Two or more structure surfaces may be solder bonded, for example, by employing heating to melt the solder and holding the couple at a temperature above the initial solder melting point of the solder until interdiffusion reduces the volume fraction of liquid so as to form a solid bond between surfaces before cooling to below the initial melting point of the solder. Subsequently received packets may be directed based on end-user IP address information included in the subsequently received packets.