(Joint Chiefs of Staff, 2005) the hierarchical structure organizations are those with a "well defined vertical chain of command and responsibility. Information flows up and down organizational channels that correspond to these vertical chains, but may not move horizontally." (Joint Chiefs of Staff, 2005) a network structure is a "variation of several basic nodal concepts, a node being an individual, a cell, another networked organization, or even a hierarchical organization." (Joint Chiefs of Staff, 2005) a terrorist network may be comprised by parts of other organizations including governments which act in a manner that can be exploited to achieve the goals of the organization. Three basic types of network structures exist: (1) chains; (2) hub; and (3) channel. In the hub structure the outer nodes are reported to communicate "with one central node, which may not be the leader or decision maker for the network."...

Questioning of individuals in the United States concerning terrorist activities is not in and of itself a violation of any type of individual rights however, questioning that involves intimidation, that is threatening or abusive is a violation of individual civil rights.
References

Counter-Terrorism (2005) Joint Chiefs of Staff publication 3-26.