International Journal of Wireless & Mobile Networks (IJWMN) Vol. 12, No. 3, June 2020
PERFORMANCE EVALUATION AND ENHANCEMENT OF VLAN VIA WIRELESS NETWORKS USING OPNET MODELER Tareq Al-Khraishi and Muhannad Quwaider Department of Computer Engineering, Jordan University of Science and Technology, Irbid , Jordan
ABSTRACT A VLAN is a logical connection that allows hosts to be grouped together in the same broadcast domain, so that packets are delivered only to ports that are combined to the same VLAN. We can improve wireless network performance and save bandwidth through the characteristic VLAN network. In addition, the implementation of VLAN greatly improves wireless network security by reducing the number of hosts receiving copies of frames broadcast by switches, thus keeping hosts holding critical data on a separate VLAN. In this paper we compare wireless network with VLAN via wireless network. The proposed network is evaluated within terms of delay and average throughput using web browsing applications and file transfer in heavy traffic. The simulation was carried out using OPNET 14.5 modeler and the results show that the use of VLAN via wireless network improved performance by reducing traffic resulting in a minimized delay time. Furthermore, VLAN implementation reduces network throughput because the traffic received and transmitted has a positive relationship with throughput. Eventually, we investigated the use of adhoc routing protocols such as AODV, DSR, OLSR, TORA and GPR to improve the performance of wireless VLAN networks.
Keywords WLAN, OPNET, Throughput, VLAN, Routing Protocols, Access Point.
1. INTRODUCTION WLAN (Wireless Local Area Networks) allows devices to move across the network from one location to another and connect to the LAN wirelessly via radio transmission to share data and applications and other resources, without being tied to connections [1][2]. Wi-Fi (Wireless Fidelity) is referred to as the standard for WLAN communication. Today, one of the most common wireless technologies used for data transfer is the IEEE 802.11 standard, due to the need for high speed data rates many standards developed to meet customer's needs [3][4]. The table 1. Show most commonly used protocol in today’s environment [5]. Table 1. Summary of Various WLAN Standards.
Standards IEEE 802.11 IEEE 802.11b IEEE 802.11a IEEE 802.11g DOI:10.5121/ijwmn.2020.12302
RF Band 2.4GHz 2.4GHz 5GHz 2.4GHz
Max. Data Rate 2Mbs 11Mbps 54Mbps 54Mbps
Range 50 – 100m 50 – 100m 50 – 100m 50 – 100m 15