The demand for computer security professionals has caused the increase of information security curricula in the universities. Information security courses benefit from such educational resources as hands-on activities, laboratory experiments and concept visualization. This paper presents a visualization tool that demonstrates various attacks popular in wireless networks. This visualization tool is intended to be used in an undergraduate level computer security course or a computer network course. The tool has been used and evaluated in two information security related classes in the Fall 2007 semester and has demonstrated effectiveness in assisting student learning.