Cybersecurity is currently one of the most concerned topics. In this course, learner will learns basic knowledge of Network. In the further learning, learner develops an understanding of real-world network security issues in order to build secure network. Learners will learn how to use security tools, such as firewall, Wireshark, cryptography, and so on. We set up some simulated training for learner to feel real network security scenes. After this course, learner will have a clear map for Cybersecurity.