N 国家重点实验室 2.The sorts and definitions of networks There are many ways to sort various networks. Geography 。 Transmission medium ·Technique used Services provision ·Functionality ● ■ Here,we introduce some ones that are based on different features and have been recognized professionally. 2020/4/23 Dr.Zhangi xU,National Key Lab on ISN,Xidian University 142020/4/23 Dr. Zhanqi XU, National Key Lab on ISN, Xidian University 14 2. The sorts and definitions of networks  There are many ways to sort various networks. • Geography • Transmission medium • Technique used • Services provision • Functionality • …  Here, we introduce some ones that are based on different features and have been recognized professionally