Wireless Local Area Network VLAN Investigation and Enhancement Using Routing Algorithms

witnessed numerous types of threats. These can be avoided via several security technologies such as WEP, 802.11i and WPA. These technologies have draw backs on performance and an alternative approaches that might have less impact on performance is the Virtual Local Area Network (VLAN). The paper introduces the integration of VLAN into WLAN system. The use of VLAN will provide the security to the system by isolating the access and grouped in such away that avoid any group from accessing unauthorized station in other group. OPNET Modeler (14.5) was used as a simulation program for this study. In the investigation, the effect of VLAN technology on decreasing the traffic in the system of the WLAN has been investigated. In the investigation also the delay, throughput, traffic sent and received with Email and Web browsing applications have been computed and compared with the conventional case of no VLAN. The results show that use of VLAN greatly reduces the throughput. This problem has been resolved via the use of routing algorithms, AODV, OLSR and DSR. The results of employment of routing algorithms with VLAN over WLAN have been investigated the enhancement in throughput has been achieved