???? ???? ?? ???? ???? ???? ?? ?? ??, ???? ???? ???? ???? ?? ???? ?? ?? ?? ??? ???? ????.??? ??? ?? ??? ?? ??? ????? ????? ?????? ?????. ??? ??? ??? ??? ?? ? ??? ???? ?? ??? ??? ??????.All a few numbering techniques use the identical structure and differ only in the duration from the identifier. Addresses can both be universally administered addres