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Download File - Computer Networks & Information Security

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Why Performance Degrades With Caching<br />

When a route is broken, route discovery returns a<br />

cached route from local cache or from a nearby node<br />

After a time-out, TCP sender transmits a packet on<br />

the new route.<br />

However, the cached route has also broken after it<br />

was cached<br />

timeout due<br />

to route failure<br />

timeout, cached<br />

route is broken<br />

timeout, second cached<br />

route also broken<br />

Another route discovery, and TCP time-out interval<br />

Process repeats until a good route is found<br />

386

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