This invention discloses a method that provides the network interface with the capability to determine the authenticity of programs used to generate and send data packets, thereby ensuring that users who send data packets are well behaved. The footrest member comprises proximal and distal portions while the telescopic linkage comprises a stationary support member mounted to the seating unit, a first telescoping arm, and a second telescoping arm. A value for the moisture content is obtained by a calculation based on an equation of moisture content =B\xd7100, when A denotes weight of the polarizer before bonding and B denotes weight of the polarizer after being kept in a dryer of 120\xb0 C. The lower connector signal conduits convey either electrical signals or data signals between each lower connector coupling contact and a signal source andor a signal receiver.