The aim of this research is to produce and to examine the feasibility of module network security system based simulation Cisco Packet Tracer for vocational learners. The model used is a model development Dick, Carey & Carey with nine steps. The product development is validated by subject matter experts with the level of validity 96%, media expert with the level of validity 92.8%, an instructional design with a level of validity 83%, individual testing at the level of validity 92.3%, small group trial with a level of validity 92% and test field trials with a validity rate of 89% with a very worthy qualification does not need revision.
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