(On the basis of "TCP/IP Routing Technology (Volume 1)", this book systematically discusses TCP/IP-related high-end routing technologies, including BGP, multicast, IPv6, and network management. In order to facilitate readers to deepen and master the knowledge learned in each chapter, this book provides a lot of case analysis materials, covering all aspects such as protocol configuration, fault inspection and elimination. Moreover, a lot of review questions and practice questions are provided at the end of each chapter to strengthen readers' memory and understanding of what they have learned. In addition to the quasi-CCIE for many preparations and the CCIE that needs to pass the re-certification, this book is also very suitable for engineering and technical personnel and network administrators who are engaged in large-scale IP network planning, planning and implementation.)