| Overlay Network |
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| CATEGORIES ABOUT OVERLAY NETWORK | |
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USES OF OVERLAY NETWORKS Overlay networks can be constructed in order to permit Routing messages to destinations not specified by an IP Address . For example, Distributed Hash Table s can be used to route messages to a node having specific logical address, whose IP address is not known in advance. Overlay networks have also been proposed as a way to improve Internet Routing , such as through Quality Of Service guarantees to achieve higher-quality Streaming Media . Previous proposals such as IntServ , DiffServ , and IP Multicast have not seen wide acceptance largely because they require modification of all Routers in the network. On the other hand, an overlay network can be incrementally deployed on end-hosts running the overlay protocol software, without cooperation from ISPs . The overlay has no control over how packets are routed in the underlying network between two overlay nodes, but it can control, for example, the sequence of overlay nodes a message traverses before reaching its destination. For example, (Resilient Overlay Network) for resilient routing; and OverQoS for quality of service guarantees, among others. LIST OF OVERLAY NETWORK PROTOCOLS
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