In one aspect of the invention, a method of communicating within an enterprise network includes, at a first client, encapsulating a first point-to-point protocol signal within a network address request header and communicating the network address request encapsulated signal toward a tunneling server. The heater may include a graduating material deposited on at least a portion of a substrate, a resistive material and a thermal barrier dielectric coating. The nano composite porous electrode material according to this invention has a porous structure such that nano-size pores are three-dimensionally connected with each other wherein walls of the pores thereof are composed of olivine type LiMnPO4 and carbon, a specific surface area Sa is 55 m2g\u22121<Sa<248 m2g\u22121, an amount of contained carbon Cc is 15. Otherwise, a relatively low deal score is generated. And the manufacturing procedure is simplified. The set of policies includes at least one of an activation isolation policy, a passivation policy, a flush policy, and a refresh policy.