而组播密钥更新是其中的一个热点问题。
And key update is one of the important problems in this subject.
而组密钥管理是安全组播的核心问题之一。
Group key management is one of the kernel problems in secure multicast.
组播技术是一种新的、高效的网络传输机制。
Multicast is a new technology with high efficiency for network transport.
但是安全问题却阻碍了组播技术的进一步应用。
However, there also exist some issues which would block further use of multicast.
组播是一人发送多人接收的技术，但它是不可靠的。
Multicast is a technology that one send data and several receive data.
现就其中组播路由协议对网络性能的影响进行了研究。
The paper performs the study on the influence of multicast route protocol on network performance.
可以说，组播已经成为新一代网络不可缺少的关键技术。
Multicast has become an indispensable technology of the next generation of Internet.
组播传输提高了数据传送效率，减少了网络出现拥塞的可能性。
It improves the data transport rate and decreases the possibility of network congestion.
即单节点保护算法可以保护除失效节点之外的其余组播群成员。
The single node protection algorithm can protect every group member except the failure member.
在数字有机体流媒体系统中，流媒体组播业务是一项主要的系统应用。
In the stream media system, multicast application is one kind of important application services.
groupName：多播组数目。
客户端可通过如下方式加入多播组。
The client can join the multicast group in the following way.
离开一个多播组。
离开一个多播组。
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