A network switch for network communications includes a first data port interface supporting a plurality of data ports transmitting and receiving data at a first data rate. The joining means include at least one elongate tubular member having a first end adapted to be inserted through a hole formed in a first side wall of at least the outer one of the header tubes, and a second end extending through a corresponding hole in the side face of the connector block, whereby the second end communicates with the connection means. The second power converter is adapted to convert the input to a second voltage output and includes a second diode and a second transformer having a second primary winding. 21 m including 15-60% by number of particles in the range of 1. The generic rule structure is compatible with all of the plurality of peer-to-peer networks.