单选题
发布日期:2021-03-12
IPv6的任播地址用于取代IPv4的广播地址
任播地址可以作为IPv6包的源地址或者目的地址
路由器会将目标地址是任播地址的数据包发送给距离本路由器最近的一个网络接口
源节点必须指定到达最近任播节点的详细路由
广播地址(Broadcast Address)是专门用于同时向网络中所有工作站进行发送的一个地址。在使用TCP/IP 协议的网络中,主机标识段host ID 为全1 的IP 地址为广播地址,广播的分组传送给host ID段所涉及的所有计算机。例如,对于10.1.1.0 (255.0.0.0 )网段,其直播广播地址为10.255.255.255 (255 即为2 进制的11111111 ),当发出一个目的地址为10.255.255.255 的分组(封包)时,它将被分发给该网段上的所有计算机。
任播(Anycast),又称为选播、泛播或任意播,是IPv6中定义的一种新型通信服务,是IPv6中三大通信方式之一,该定义最早由C Partridge在RFC 1546中首次提出,但是RFC1546对任播的描述仅仅是一个实验性的服务。
取代是指有机分子里的某些原子或原子团通过化学反应被其他原子或原子团所替代。包括亲核取代和亲电取代。
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