Introduction - If you have any usage issues, please Google them yourself
In addition to PPP, IP, firewall, routing, TCP, NAT, UDP, and sockets and other core issues, this book also discusses the latest protocol and protocol extensions, such as a variety of DSL access technologies used in the PPPoE protocol, Bluetooth (Bluetooth) 4 driver, and QoS (Quality-of-Service, Quality of Service) support, etc.