The purposes of the “Business Data Communication” are (1) to introduce the fundamental concept and technology of computer networks, (2) to learn the technology of constructing computer networks, including the network architecture, the types of transmission media, and network equipment, and (3) to introduce the business concerns of computer networks, including the construction policy and cost analysis. The students are requested to finish a project, which is to construct a business computer network. After studying this course, the students should have the concepts of business computer networks and the skills of constructing business computer networks.