摘要： 组播通信可有效减轻网络负担，避免资源浪费，是一种十分有效的通信方式。介绍了IP组播通信机制，并采用Winsock2实现了一个多方会话系统MultiChat，以通过IP组播实现多人之间基于正文的对话。

关键词: IP组播, Winsock, Internet组管理协议, 组播路由, 组播树

Abstract: Multicast communication is a very effective communication mode，which can lighten greatly network loads and avoid wasting resources．This paper introduces the mechanism of IP multicast communication and the implementation of MultiChat --a conversational system with Winsock 2 ，in order to realize conversations for persons based on text using IP multicast ．

中图分类号: 

• TP393