组播和广播的区别?

昨日今天永远2022-10-04 11:39:541条回答

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一站德胜门共回答了14个问题 | 采纳率64.3%: 你首先要明白组播和广播的定义：
组播（multicasting）是一种多点投递的形式,它使用硬件技术,通过使用大量组播地址来通信.当某一组机器需要通信时,选择一个组播地址,并配置好相应的网络接口硬件,识别组播地址,从而收到该组播地址上分组的拷贝.
广播（broadcasting）是多点投递的最普遍的形式,它向每一个目的站投递一个分组的拷贝.它可以通过多个单次分组的投递完成,也可以通过单独的连接传递分组的拷贝,直到每个接收方均收到一个拷贝为止.
举个例子：县里开大会,只同时通知了A村、B村、C村参加就是组播；同时通知了所有的村子参加就是广播了!; 1年前

英语翻译该协议通过降低密钥树的高度来减少密钥数量,而且用户可以利用服务器组播的随机数来自行同步更新密钥,减少服务器更新密 英语翻译 该协议通过降低密钥树的高度来减少密钥数量,而且用户可以利用服务器组播的随机数来自行同步更新密钥,减少服务器更新密钥的开销. 小虫52113141年前7: jacky4102 共回答了16个问题 | 采纳率81.3%

Through reducing the height of key tree,this agreement aims at cutting down the key quantity.Additinally users can synchronize and upgrade the key by themselves with help of the random number of server farm.In this way,they can pare down expenses in the upgrading of server key.
【英语牛人团】牛人倾情奉献,

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英语翻译在分簇的无线传感器网络中,簇内节点会经常进行组播,为保证报文和节点信息的安全性,本文设计了一种灵活高效的组密钥管
英语翻译
在分簇的无线传感器网络中,簇内节点会经常进行组播,为保证报文和节点信息的安全性,本文设计了一种灵活高效的组密钥管理方案.在本文方案中,初始组密钥的计算和节点退出时组密钥的更新,采用的是改进后的基于身份的广播加密算法,该算法进一步减少了广播报文的长度,降低传输能耗；而新节点加入和密钥生命期结束时组密钥的更新,采用的是能耗较小的对称加密方法.本文方案可以抗同谋攻击、仿冒攻击.在相同的安全标准下,与egkas等其他方案相比,本文方案占用存储空间更小,能耗更低,且存储和密钥更新***于群组大小,具有良好的扩展性.
本人存在问题的翻译结果：
the nodes always multicast in the cluster-based wireless sensor networks.in orderto make sure of the message's safety,an efficient and flexible group keymanagement scheme is designed in this paper.in the scheme,an improved broadcastencryption algorithm based on identity is adopted to calculate the initialgroup key and update the group key when nodes exit.the algorithm furtherreduces the broadcast message’s length and cut down the energy consumptionin transmission .when a new node joins the network or the life period ofgroup key is at end,the update of group key uses symmetric encryptionalgorithm which has low-energy.this plan can resist collusion attacks andphishing attacks.it has less storage message length and lower energy thanothers like egkas in the same safety standard.the key refreshment and storageis independently from the size of group,so it has good extension.
求大神给予指正,大谢.

景新山水1年前1: zhangbin1979 共回答了19个问题 | 采纳率89.5%

In clustering wireless sensor network (WSN), within the cluster nodes will often for multicast, to guarantee the security of message and node information, this paper designs a flexible and efficient group key management scheme. In this scheme, the calculation of the initial set of keys and node exit group key update, is improved based on the identity of the broadcast encryption algorithms, the algorithm to further reduce the length of the broadcast message, reduce transport energy consumption; The new node to join and the key at the end of life period of group key update, using symmetric encryption method of energy consumption is small. This scheme can resist conspiracy attacks, counterfeit attack. Under the same security standard, compared with other schemes such as EGKAS, this scheme takes up less storage space, lower energy consumption, and storage and group key update is independent of the size, has a good scalability.

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组播和广播的区别?

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