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MANET consists of mobile nodes which exchange information dynamically among them over wireless links. The most important element of MANET is routing protocols which are needed to handle dynamic communication and also find route so as to deliver data packets to the correct destination. Performance of routing protocols is an important issue because of dynamic nature of MANET. In this paper, performance of AODV, OLSR and GRP routing protocols is evaluated for FTP based application traffic on IEEE 802.11 WLAN standard and 48 Mbps data rate. The network performance is evaluated by using OPNET simulator based on various quantitative metric-networks load, throughput, retransmission attempts and media access delay by varying physical characteristics and number of nodes.
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