The prosafe plus switch is an upgrade to unmanaged switch which can only plug n play and is not configurable prosafe plus switch gives user the flexibility to configure certain static layer 2 settings to better fit their needs the gs116e is a 16 port gigabit switch gs116e supports loop detection when a loop is detected the both led on the affected port will blink at a constant speed with roughly 1 every second dos is a form of attack on computer network resources the auto dos feature