What leads to this is that IP multicast technology lacks security control while providing simplicity and openness: users can join a multicast group and can send data to a group at will, which makes it hardly useful in commercial environment.

• 阻碍IP组播技术部署的原因是组播技术在保持简单性和开放性的同时缺少必要的安全控制,用户可以随意地加入组播组和随意地向组播组发送信息,这种随意性使得IP组播很难在商业应用中有所作为。