Lesson plan
DSRFLOW
DSRFLOW, the Flow-State extensions to Dynamic Source Routing (DSR), are a set of extensions that provide all of the benefits of source routing, without most of the per-packet overhead that is associated with source routing. It works by allowing most packets to be sent without a source route header, thus substantially reducing overhead. Indeed, one of the disadvantages of DSR was that the longer the source route of the packet was, the bigger the packet header became. The technique used is called implicit source routing. Flow state extensions to DSR were first described in "Implicit Source Routes for On-Demand Ad Hoc Network Routing" by Yih-Chun Hu and David B. Johnson (2001). The implicit source routing mechanism is now included in the DSR Internet Draft. The main idea of DSRFLOW is to introduce a so-called flow table for each network node and thus making DSRFLOW a stateful routing protocol. For each flow a node forwards there is one entry in the flow table which minimally must record the next hop address.
Article summary
DSRFLOW, the Flow-State extensions to Dynamic Source Routing (DSR), are a set of extensions that provide all of the benefits of source routing, without most of the per-packet overhead that is associated with source routing. It works by allowing most packets to be sent without a source route header, thus substantially reducing overhead. Indeed, one of the disadvantages of DSR was that the longer the source route of the packet was, the bigger the packet header became. The technique used is called implicit source routing. Flow state extensions to DSR were first described in "Implicit Source Routes for On-Demand Ad Hoc Network Routing" by Yih-Chun Hu and David B. Johnson (2001). The implicit source routing mechanism is now included in the DSR Internet Draft. The main idea of DSRFLOW is to introduce a so-called flow table for each network node and thus making DSRFLOW a stateful routing protocol. For each flow a node forwards there is one entry in the flow table which minimally must record the next hop address.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.