16. The networking device of claim 11 , wherein the creating of the combined packet comprises: identifying the first network packet, the first network packet representing a request; identifying the second network packet, the second network packet representing an acknowledgement, wherein the second network packet: occurs after the first network packet, and represents an acknowledgement corresponding to the first network packet; and identifying a third network packet wherein the third network packet occurs between the first network packet and the second network packet, and wherein the third network packet represents a communication between the first and second nodes.
11. A networking device adapted to detect a network activity of interest, comprising: a network port adapted to connect to a network, wherein the network port is adapted to (a) obtain a plurality of network packets from the network, wherein the obtained plurality of network packets comprises network packets categorized as Transmission Control Protocol (TCP) packets and Internet Protocol (IP) packets, wherein the obtained plurality of network packets include the network activity of interest; one or more processors operatively coupled to the network port, wherein the processor is adapted to: (b) create a combined packet from at least two network packets of the plurality of network packets, wherein creating the combined packet comprises converting, bitwise, content from a portion of a first network packet and a portion of a second network packet into a plurality of integers, wherein the first network packet represents a communication from a first node to a second node, and wherein the second network packet represents a communication from the second node to the first node; (c) obtain a stored meta-expression that: comprises a plurality of integers in an order, and corresponds to presence of the network activity of interest in network traffic; (d) determine whether the meta-expression obtained in c) appears in the combined packet created in (b); and (e) in response to determining that the meta-expression obtained in (c) appears in the combined packet created in (b), initiating an operation; and a memory operatively coupled to the one or more processors, wherein the memory is adapted to store the meta-expression.