除了PPP、IP、防火牆、路由、TCP、NAT、UDP及套接字等核心問題外，本書還討論了最新的協議及協議擴展，譬如各種DSL訪問技術中用到的PPPoE協議、Bluetooth(藍牙)四驅動程序及QoS(Quality-of-Service，服務質量)支持等-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.