Conventional TCP/IP network suffers some problems, such as simplex services, source address spoofing and implosion of negative acknowledgement in multicast, in the course of its development.

• 传统的TCP/IP网络在发展过程中遇到了一些难以克服的问题,比如服务单一、源地址欺骗、多播中否定应答风暴等。