A comparison of AODV and DSR under attack by black hole nodes in a ns-3 simulation
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Authors
Fogwell, Thomas Edward
Issue Date
2018-12
Type
Dissertation
Language
en
Keywords
AODV , DSR , MANET protocol comparison , MANET security , ns-3 , Black hole attack , AODV vs DSR , Simulation
Alternative Title
Abstract
Mobility and portability of wireless communication devices in Mobile
Ad Hoc Networks (MANETs) have introduced data security threats.
These threats are due to the utilisation of multiple hops resulting from
limited transmission ranges between the source and destination nodes.
This study aims to prove the impact black hole attacks can have
on MANETs, more speci cally, how attacks impact two di erent re-
active protocols. It is envisioned that a comparative analysis of two
protocols, AODV and DSR, will assist the audience understand their
side by side performance while under attack with nodes using vary-
ing models of mobility. The simulation criteria used have network conditions favourable for optimum functioning of reactive protocols.
Optimal conditions for the functioning of reactive protocols include
densely distributed nodes that do not move sporadically.
The simulation is conducted using ns-3 and NetAnim. It involves
the use of a base implementation of AODV and DSR using ns-3 as
a benchmark for the e ects that black hole nodes introduce into a
network. Similarly, the AODV and DSR implementation that have
black hole nodes present in the network is included, in order to measure
the e ects of the black hole nodes. Thereafter, the performance of these protocols is compared when under attack, keeping the environment the
same.
Results generated from this study indicate that DSR outperforms
AODV while having black hole nodes in the node population under
various con gurations. The dominance of DSR is ascribed to the fact
that DSR can keep several routes and make a decision on those routes,
while AODV gives more responsibility to the network for the best
route. This means that, changing the hop count to a low value can
fool the source node to choose the route.