A system and method is presented that uses hardware at a central node to determine if bandwidth being provided to a remote node in accordance with an unsolicited grant service flow requires adjustment. Each orthogonal frequency division multiplexing frame comprises a plurality of orthogonal frequency division multiplexing symbols. The resin layers on the both sides have different thicknesses from each other, and a thinner layer out of the resin layers has a thickness equal to or smaller than a mean particle diameter of an electrically conductive filler contained in the electrical conductor. Other processing methods to selectively remove non-desired components include distillation to remove polar low boiling point components, filtration through adsorbents selective for sulfur compounds, countercurrent extraction and column chromatography. The process includes sharing between the client and the server a challenge identifying a random subset of the plurality of predefined locations in the server path, and a response including characters that match the characters in the locations on the server path identified by the challenge. R1 and R2 are independently H or C1-3alkyl, m is 0\u20133; X1 is NH, NCH3, O, S; R3, R4 and R5 are independently H, CH3, CF3, OCH3, allyl or halogen; X2 is n wherein n is 1 or 2; R10 and R11 independently represent H, fluorine or C1-16alkyl; R26 and R27 are independently H, C1-3 alkyl or R26 and R27 together with the carbon atom to which they are bonded form a 3\u20135 membered cycloalklyl ring.