Figure 5 shows the throughput (PDF) of DSDV, DSR and
AODV at different speed and nodes. The DSR and AODV
outperform DSDV. And throughput is constant irrespective of
the speed or nodes. DSDV performance decreases as the
mobility increases because of the presence of stale routing
table entries and packets are sent or forwarded over broken
links and it degrades at high speed. The throughput of DSR is
better than AODV, because DSR has access to a significantly
greater amount of routing information than AODV in single
cycle of route discovery. Being the source routing protocol,
DSR can learn routes to each intermediate nodes on the route
to the destination in a single request- reply cycle. And AODV
uses too many routing packets to build necessary routing
information. The throughput of DSDV varies with the number
of nodes. It decreases initially when the number of nodes is 30
but after that it increases for 40 nodes. Also DSDV behavior
has been tested thoroughly and found variable behavior.