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Comparison Study of ISP (Internet Service Provider) Between Iran And India (2009-2011)
Get PDFIn this article, we have compared the internet services offered by Internet Service Providers in Iran and India during 2009/2011. We have also tried to analyze and compare speed of internet, amount of internet/broadband usage in India and Iran. We have also tried to analyze and compare the number of social network users in India, Iran and other countries. We have also analyzed the strength and weakness of all these things
Defining Malicious Behavior of a Node and its Defensive Techniques in Ad Hoc Networks
Get PDFAny node under attack in ad hoc network exhibits an anomalous behavior called the malicious behavior. In this situation, the entire operation of a network gets disturbed and to preclude such malicious behavior several security solutions have been discovered. In this paper, malicious behavior of a node is defined and to defend such behavior, security solutions are presented which are used in furnishing a secure and reliable communication in ad hoc networks
An Approach for Establishing Trust among Nodes in Ad Hoc Network
Get PDFA node in ad hoc network is accountable for routing the packets to neighboring nodes. This evolves trust factor among nodes which assists in forwarding the packets to other nodes if it is trusted and thereby furnishes a secure & reliable communication. This trust can be defined by several approaches which are based on behavior, monitoring, policies etc. In this paper, an approach is proposed to establish trust among nodes which can be evaluated by monitoring the nodes for their behavior. The values are defined for trust which is dynamic in nature and depends on the behavior of nodes
Wireless Testing Tool for Wireless Routers
Get PDFWireless test tool is a powerful tool for wireless network monitor and analyzer for 802.11 a/b/g/n networks. Loaded with many user-friendly features, Wireless test tool for Wi-Fi combines performance and flexibility with an ease of use in the industry. Wireless test tool for Wi-Fi captures every packet on the air to display important information such as the list of access points, IP address etc. By providing this information, Wireless test tool for Wi-Fi can help you view and examine packets, network problems, and troubleshoot software and hardware
Delay Tolerant Cluster Based Routing For Wireless Sensor Networks
Get PDFIn a dynamic Wireless Sensor Network (WSN) the movement of each sensor node affects the structure of network which may result in inefficient routing. Various difficulties in a dynamic network may include lack of communication between the nodes, end to end delay and transmission overhead. Transmitting data in a dynamic network to the destination node with less delay is the major problem to be addressed. Sensed data can be transmitted using flooding scheme, where the end to end delay can be minimized but results in transmission overhead. In this scheme sensed data is broadcasted to all the nearby nodes until it reaches the sink node. The proposed system make use of cluster based routing protocol, where the sensor nodes with similar mobility pattern are grouped into cluster. Exponentially weighted moving average (EWMA) scheme is used for updating the nodal contact probability of each cluster node. Two Gateway nodes are selected for routing which performs data transmission. The simulation result shows that cluster based routing protocol implemented for a dynamic wireless sensor network result in less end to end delay
Detecting & Eliminating Rogue Access Point in IEEE 802.11 WLAN
Get PDFRogue Access Points (RAPs) is one of the leading security threats in current network scenario, if not properly handled in time could lead from minor network faults to serious network failure. Most of the current solutions to detect rogue access points are not automated and are dependent on a specific wireless technology. In this paper we propose the integrated solution for detection and eliminate the rogue access points. Rogue detection algorithm is also proposed. This Methodology has the following properties: (1) it doesn’t require any specialized hardware; (2) the proposed algorithm detects and completely eliminates the RAPs from network; Our proposed solution is effective and low cost
Multi Carrier Symbol Recovery in OFDM using ANN in Wireless Channel
Get PDFOrthogonal Frequency Division Multiplexing (OFDM) is a special type of multicarrier technique where a single data stream is transmitted over a number of low rate sub carriers. OFDM has been adopted as the modulation method of choice for practically all the new wireless technologies being used and developed today. But symbol recovery is still a problem area in OFDM. We have used an Artificial Neural Network (ANN) for recovery of symbols transmitted using different sub-carriers in OFDM. The investigation is made in the multipath fading environment using different modulation techniques. The ANN is trained to recover symbols transmitted using different modulation schemes and with multiple subcarriers. The experimental results derived show the effectiveness of the model proposed
Localization in Wireless Sensor Network Using MDS
Get PDFIn this paper, determining the localization of nodes in a Wireless Sensor Network is a very important task, which involves collaboration between sensor nodes. Localization is a fundamental service since it is relevant to many applications and to the network main functions, such as: routing, communication, cluster creation, network coverage, etc. Collaboration is essential to self-localization, so that localization can be accomplished by the nodes themselves, without any human intervention. In this paper, we first analyze the key aspects that have to be considered when designing or choosing a solution for the localization problem. Then, we present MDS localization algorithm. With this analysis of results simulated. We identified the results in topologies by taking different cases and we have addresses shortcomings, which are caused by anisotropic network topology and complex terrain, of existing sensor positioning methods. Then, we explore the idea of using multidimensional scaling technique to compute relative positions of sensors in a wireless sensor network. A distributed sensor positioning method based on multidimensional scaling is proposed to get the accurate position estimation and reduce error cumulation. Comparing with other positioning methods, with very few anchors, our approach can accurately estimate the sensors’ positions in network with anisotropic topology and complex terrain as well as eliminate measurement error cumulation. We also propose an on demand position estimation method based on multidimensional scaling for one or several adjacent sensors positioning. Experimental results indicate that our distributed method for sensor position estimation is very effective and efficient
Normalized Transfer of Bulk Data By Using UDP In Dedicated Networks
Get PDFHigh speed bulk data transfer is an important part of many data-intensive scientific applications. TCP fails for the transfer of large amounts of data over long distance across high-speed dedicated network links. Due to system hardware is incapable of saturating the bandwidths supported by the network and rise buffer overflow and packet-loss in the system. To overcome this there is a necessity to build a Performance Adaptive-UDP (PA-UDP) protocol for dynamically maximizing the implementation under different systems. A mathematical model and algorithms are used for effective buffer and CPU management. Performance Adaptive-UDP is a supreme protocol than other protocols by maintaining memory processing, packet- loss processing and CPU utilization. Based on this protocol bulk data transfer is processed with high speed over the dedicated network links
Data Security Using Armstrong Numbers
Get PDFIn the real world, it is difficult to transmit data from one place to another with security. To ensure secured data transmission, universal technique called cryptography is used, which provides confidentiality of the transmitted data. In this paper Encryption and decryption process uses Armstrong number which is referred as a secret key. To make the Authentication between two intended users along with the security, server is used. With the help of server, both sender and receiver will get validated. Then actual data could be transmitted by any of the means