Network defense can be a tricky item to deal with; there are threats that reside both internal and external to a given organization. Hence, while there are software tools to deal with those threats that are external (which usually use digitized methods of attacks), internal threats are much harder to see and detect and can come in the form of both personnel and programs alike. Therein it can be very difficult to prevent internal exploits. Present at least three solutions to this problem while discussing with your peers their ideas and stance on such issues.