A network security system having a hierarchical configuration is provided. During their travel, the containers are supported by a support assembly, and aligned and advanced in a controlled manner in the entry zone by an alignment and propulsion mechanism. The moisture guards may be of various configurations and by either completely or incompletely surround the fastener locations. 5undecan-2-one compounds and related derivatives, to compositions containing and to uses of such derivatives. The adapter also has a docking structure for a tracking device such that there is a known relation between the tracking device and the axis of the opening and the axis of a tool that is inserted in the opening.