Analyzing predetermined sets of bits sequentially if former bits cannot be classified

摘要

Disclosed is a method for determining a flow of data. The method comprises the steps of: a) receiving a data packet; b) providing a memory containing tables populated with a finite number of listed bit sets; c) extracting from the packet a first set of bits designated for extraction; d) inputting the extracted first set of bits into the memory and comparing it with the listed bit sets in a table to determine whether the extracted first set of bits matches one of the listed bit sets; e) determining whether the packet receives a predetermined classification value or a designation that the packet cannot be classified based upon the match; f) applying a predetermined result or procedure to the packet upon determining that the packet can be assigned a classification value from the table; and g) upon determining the packet cannot be classified, continuing to sequentially process the remaining sets of bits designated for extraction by repeating procedures c-f until such point that an extracted set of bits matches a bit set listed in a table that has an assigned classification value or all sets of bits in the packet designated for extraction have been extracted and compared to the entries of at least one table. Each listed bit set has an equal number of bits as a set of bits previously designated for extraction from the packet and each listed bit set is associated with either a predetermined classification value or a designation that the packet cannot be classified.