TCP穿越NAT编程比较复杂，这是两篇分析穿越的论文。-TCP NAT-programming more complicated, which is analyzed through the two papers.

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

这是基于TCP协议的NAT穿透技术在P2P中的研究与实现的pdf文件，包括原理，穿透过程，很有参考价值-This is the penetration process of TCP NAT traversal in P2P pdf file, including the principle of great reference value! !