(Design and test of enterprise-level network design solutions. Enterprise network topology, IT design, testing, etc. As a large shipbuilding center, China Shipping Industry (Jiangsu) Co., Ltd. is responsible for various tasks of the shipbuilding industry, and each task as a whole requires the exchange and integration of various data and information. Therefore, the informatization construction of enterprises is used to ensure the normal and stable communication of various businesses. The design of the informatization network must fully consider the requirements of digital use and intelligent management, and follow the requirements of functionality, practicability, compatibility, forward-looking, Principles of security, scalability and economy.)