Patent ID: 7206862
Filing Date: 2007-04-17
Classification: H04L

Abstract:
1. A method for ensuring that a received response message corresponds to a previously forwarded request message on a network node including a mapping function, the method comprising the steps of: at the network node, receiving an outgoing packet for which a response is expected, the outgoing packet including state information comprising a first set of data bit values; first mapping, by the mapping function, the first set of data bit values to render a first mapped data value; setting an entry within a bitmap at a position corresponding to the first mapped data value, the bitmap residing at the network node; forwarding the outgoing packet to an end node, the end node comprising a name resolution cache; at the network node, receiving an incoming packet from the end node, the incoming packet including state information comprising a second set of data bit values, the second set of data bit values corresponding to the first set of data bit values; second mapping, by the mapping function, the second set of data bit values to render a second mapped data value; testing an entry within one or more bitmaps; establishing a match between the first mapped data value and the second mapped data value with a mapping function value rendered from state information for a previous request packet; and performing at least one function upon the incoming packet based upon whether the match is established during the testing step.