(1. Knowledge Objectives Through the study of this course, students should master the basic knowledge of computer network, including network definition, organization, system structure, IP address, subnet division, VLSM, etc.; master the access method of switches, basic configuration, VLAN configuration, STP configuration and VTP configuration and routing of Layer 3 switches. 2. Competency objectives Through the study of this course, students should be proficient in subnetting and designing classless networks; be able to access and configure switches using in-band and out-band methods; be proficient in configuring VLAN, STP and VTP of switches; be able to use Layer-3 switches realize communication between different network segments; 3. Quality objectives Through the study of this course, students can be trained to improve their computer professional level and industry quality; cultivate entrepreneurial spirit, professionalism and industry ethics awareness; cultivate comprehensive use of knowledge analysis, The ability to manage problems; cultivate spatial imagination and innovation; form a correct and standardized way of thinking and analysis; cultivate a serious and responsible, diligent and diligent office attitude, rigorous and meticulous office style; cultivate comprehensive quality and improve teamwork spirit.)