Network Weaving

This technique, more commonly known as "looping," involves using numerous networks in an attempt to avoid detection. For example, a hacker might dial into Company A's PBX system to obtain an outside line that can be used to dial into Company B's network. This typically happen if DISA (Dial Inwards, System Access) is enabled with no protection.

If Company B can track the origin of the hacker's call, it will lead them to Company A, not to the hacker.

The above is a relatively simple example. Hackers have been known to "loop" through 15 or 20 different networks before arriving at their final destination. Network weaving can make it extremely difficult for an investigator to trace the point of origin for a specific telephone call or data transmission.

A Windows utility called Traceroute can map the route that you take to get to a final destination, identifying any 'hops' on the way