Patent ID: 7860969

Claim:
A data processing system-implemented method of tracking movement between network addresses comprising: receiving, at a first time at a tracking server, a request for a first network address from a client computer, wherein the first network address is from a first frame provided to the client computer by a content server, wherein the request contains a first frame identifier for the first frame, and wherein the content server and the client computer are coupled to the tracking server via a network; finding a record in a database accessible by the tracking server, wherein the record comprises the first frame identifier, a second network address from the first frame provided to the client computer by the content server, and a second time, wherein the second time precedes and is temporally closest to the first time, wherein the finding is performed using the tracking server; and generating an entry for a table in the database that includes the first frame identifier, the first network address, the second network address, and a third time, wherein the generating is performed using the tracking server.