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In VANET high speed is the real characteristics which leads to frequentbreakdown, interference etc. Therefore Performance of adhoc routing protocolsis helpful to improve the Quality of Service (QOS). In this paper we studiedvarious adhoc routing protocols, Reactive, Proactive & Hybrid, taking in toconsideration parameters like speed, altitude, mobility etc in real VANETscenario. The AODV and DYMO (Reactive), OLSR (Proactive) and ZRP (hybrid)protocols are compared for IEEE 802.11(MAC) and IEEE 802.11(DCF) standard usingQualnet as a Simulation tool. Since IEEE 802.11, covers both physical and datalink layer. Hence performance of the protocols in these layers helps to make aright selection of Protocol for high speed mobility. Varying parameters ofVANET shows that in the real traffic scenarios proactive protocol performs moreefficiently for IEEE 802.11 (MAC) and IEEE 802.11(DCF).

Performance evaluation aodv, dymo, olsr and zrpad hoc routing protocol for ieee 802.11 mac and 802.11 dcf in vanet using qualnet