Analyzing Wireless Local Area Network Traffic Authentication Delay in Different Metrics to Improve Its Performance

Abstract

The WLAN Standard 802.11n is the most popular wireless network nowadays. However, the network performance is always important anxiety for users who is ready to migrant from wired to wireless network. In this paper we analyzed the network performance of IEEE 802.11n physical characteristics of wireless network while running different applications on different wireless network personal computer using physical characteristics of HT PHY5.0GHz 802.11n and in different data rate. Applications included Database, HTTP and FTP. For the experiment, a wireless LAN was built that included 10 wireless clients and an Access point [AP].The experimental test was completed to analyze 802.11n standard wireless local area network performance on the network with different level of security with Database, FTP and HTTP server application. The network device such as router is configuring throughout Open Shortest Path First routing protocol to decrease utilization, create specific load distribution over the network.In this paper we tested three scenarios that modeled are: 1.No Security Scenario, 2.Limited Security Scenario and 3.Advanced Security Scenario. The level of protection used was 802.11n to filter and block some applications and their performance is analyzed. Twenty workstations are used in the simulation which all accesses the Database, FTP and HTTP server under different scenarios. The relationship between network security and performance are estimated which include the effects of protection such as firewalls on network performance. Various scenarios were evaluated through simulations using Riverbed Modeler Academic Edition 17.5(OPNET17.5) and explained the property of unusual levels of safety on a network using 802.11n wireless network standard then proposed a solution.