US Patent 9419851 Application transaction tracking across network boundaries

A computing device is provided that automatically tags and tracks Transport Control Protocol (TCP) packets through one or more communications networks. An agent module at a sending device inserts tracking tags into the headers of TCP packets before sending the TCP packets to a remote receiving device. The receiving device also comprises an agent module that identifies and associates the tracking tags of the received TCP packets with the data carried by those TCP packets. The associations are stored in memory for later analysis by an application administrator or systems engineer.