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IGMP means Internet Group Management Protocol. This protocol is used to establish and maintain multicast group membership between IP host and its directly adjacent multicast routers, but does not include the dissemination and maintenance of group membership information between multicast routers. This part of the work is completed by each group of broadcast routing protocols. All hosts participating in multicast must implement IGMP.节奏 - EXO香荽把脸埋进郑氏怀里，娇声道：娘。《大敦煌》采用宋代、清末和民国三个历史阶段的创作形式，以一部金字大藏经的命运为贯穿，反映了千年敦煌的形成、发展、辉煌、衰败、重生的过程。那地方是被王家族中一偏房所购。The learning platform launched on that day is called "Learning Power". No matter from the time node, the attendees or even the names of the platform, it obviously has a very heavy weight.大虾因为送快递无意间卷入一场文物案中，要被人灭口，孙应男一直在保护他。大虾也在快递工作与危险之中渐渐成长。当孙应男因为身上的玉环成为犯罪分子的目标而遇到危险时……