Benx Blog

六月 8, 2013

Diigo Diary 06/08/2013

Filed under: Diigo Diary — benxshen @ 8:30 上午
    • P multicast is a technique for one-to-many and many-to-many real-time communication over an IP infrastructure in a network.
    • Multicast uses network infrastructure efficiently by requiring the source to send a packet only once, even if it needs to be delivered to a large number of receivers. The nodes in the network (typically network switches and routers) take care of replicating the packet to reach multiple receivers such that messages are sent over each link of the network only once.
    • Key concepts in IP multicast include an IP multicast group address,[2] a multicast distribution tree and receiver driven tree creation.[3]
    • Although not developed under the OSI Reference Model and not strictly conforming to the OSI definition of the transport layer, the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) of the Internet Protocol Suite are commonly categorized as layer-4 protocols within OSI.

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