The course will teach the basic computer network concepts and their commercial applications. The course covers the basic concepts and technologies in building computer networks; business considerations in computer networks, including building strategies, commercial use and cost analysis. Students in the course of this course, will implement a network system application, to validate the theory of the classroom practice in the topic. Upon completion of this course, students have a computer network of knowledge and techniques and are able to independently build practical commercial computer networks. Teaching materials include English textbooks, Chinese reference books and handouts.