This project comprehensively addresses network management security, encompassing various aspects of network design, configuration, and security protocols. It begins with network topology diagrams, IP addressing plans, and an explanation of the OSI model. The project then delves into the CSMA/CD algorithm and the IPv6 protocol, including its header structure and addressing models. Further, the project includes practical implementations such as creating an AAA model, configuring VPNs, and setting up switch configurations, including VLANs, access ports, and trunk ports. It also covers the configuration of spanning tree protocol (STP), rapid PVST+, dynamic switch port security, and SSH configuration for secure remote access. The project is supported by screenshots of the configurations and a bibliography of relevant sources.