期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
卷号：4
期号：1
页码：18931
DOI：10.15680/IJIRSET.2015.0401068
出版社：S&S Publications
摘要：In the era of information and communication technology, WLANs are being used for military,multimedia and health application, where high system performance and the ability to stay in link is extremelyrequired. WLAN supports best-effort service at lower investment and cost. Apart from low cost ,IEEE 802.11technology is relatively easy, quick to install , and operating on a unlicensed frequency of 2.4 GHz which can be builtindependently by the individual or organization without reliance on operator. With the increasing demand andpenetration of wireless services, users now expect good Quality of Services (QoS), in terms of delay; media accessdelay, throughput, and retransmission attempts. The author has studied the effect on Security by changing number ofnodes, changing data rates and changing attacks. The effects of variation of these parameters on Throughput, AverageJitter, Average End to End Delay, Peak Queue Size and Average Queue Length have been studied Throughput ofCCMP Security Protocol is more by 13.3% in comparison to WEP Security Protocol. In CCMP Average Jitter andAverage End to End Delay are lesser by 7.4% and 10.24% respectively in comparison to WEP Security Protocol. Thissimply proved that CCMP Security Protocol is provides better security in comparison to WEP Security Protocol andremove the flaws of WEP Security Protocol. Wormhole Attack and Eavesdrop Attack badly affected the performanceof IEEE 802.11 WLANs. Throughput in wormhole attack reduces by 17% in comparison to eavesdrop attack. AverageJitter and Average End to End Delay reduces by 14% and 8% respectively in Eavesdrop Attack in comparison toWormhole Attack.
关键词：Quality of Service; wireless LANs; performance evaluation; MAC protocol.
