Hot potato routing is a routing technique enabling packet routing without storing them in buffers. The hot potato routing technique continuously transfers data packets until reaching their destination without the packets having to wait or being stored in a buffer. Any router configured for hot potato will immediately route the packet upon receiving it. Unlike other routing techniques, where the packets compete for the best path to the destination node having to wait if it's not available, hot potato routes packets whenever it receives them, regardless of whether the primary and optimal transmission route is available or not. This term is also known as deflection routing.
Routing of data packets over an internetworked environment can take place using many different techniques and scenarios. Sometimes all the packets flow over the best path and have to wait if it is not available. In other cases, a packet is forwarded as soon as it is received. Hot potato routing is a technique passing data packets to their destination immediately without storing or holding them. The router will immediately pass the packet to its destination or the next available router relying on the least delay as a metric in making the path selection.
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