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The DSDV [6] routing protocol is a proactive routingprotocol, described in detail in this paper. It is based onthe Bellman-Ford routing algorithm. Each node in thenetwork maintains a routing table which contains allavailable destinations with associated next hop towardsdestination, metric and destination sequence number.Sequence number presents improvement of DSDV routingprotocol compared to distance vector routing, and it isused to distinguish stale routes from fresh ones and avoidformation of route loops.Routing tables are updated by exchanging theinformation between mobile nodes. Each nodeperiodically broadcasts its routing table to its neighbors.Broadcasting of the information is done in NetworkProtocol Data Units (NPDU) in two ways: a full dump andan incremental dump. A full dump requires multipleNPDUs, while the incremental requires only one NPDU tofit in all the information. A receiving node updates itstable if it has received a better or a new route. When aninformation packet is received from another node, nodecompares the sequence number with the availablesequence number for that entry. If the sequence number islarger, entry will be updated with the routing informationwith the new sequence number, whereas if the informationarrives with the same sequence number, metric entry willbe required. If the number of hops is smaller than theprevious entry, new information will be updated. Update
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