...assumption of finite number of terminals and ideal channel conditions. The proposed analysis applies to both the packet transmission schemes employed by DCF, namely, the basic access and the RTS/CTS access mechanisms. In addition, it also applies to a combination of the two schemes, in which packets longer than a given threshold are transmitted according to the RTS/CTS mechanism. By means of the proposed model, in this paper we provide an extensive throughput performance evaluation of both access mechanisms of the 802.11 protocol. Index Terms—802.11, collision avoidance, CSMA, performance evaluation. I. INTRODUCTION N recent years, much interest has been involved in the design of wireless networks for local area communication [1], [2]. Study group 802.11 was formed under IEEE Project 802 to recommend an international standard for Wireless Local Area Networks (WLAN’s). The final version of the standard has recently appeared [3], and provides detailed medium access control (MAC) and physical layer (PHY) specification for WLAN’s. In the 802.11 protocol, the fundamental mechanism to access the medium is called distributed coordination function (DCF). This is a random access scheme, based on the carrier sense multiple access with collision...
Words: 8526 - Pages: 35
...1.Analyze the Commercial Vehicle Industry at both Global and Indian scenario? Which are the top 5 countries for CV Industry? Answer : Commercial vehicles are used for carrying goods or fare-paying passengers. India: From last 20 years, India has opened its doors for multinational automobile companies to penetrate the market, modernize the Indian transportation picture and make it beneficial for users. Since then several companies have started their production units in the country and offering a wide range of vehicles and the Indian commercial vehicle market has grown by leaps and bounds.Its been observed that the commercial vehicle segment has shown great recovery after withstanding the effects of the global economic crisis. We expect the growth trend in each segment of commercial vehicles to continue in the coming years. LCV goods carrier is the fastest growing segment that is estimated to register a sales growth of around 20% during FY 2012-FY 2015.We observed that hub and spoke model and small commercial vehicles are among the major trends which would drive the Indian CV market in near future. During the regional analysis, it was found that South India leads the country in terms of commercial vehicle market. Besides, the growth in the CV industry will boost up demand for used commercial vehicles in coming years. Global: The global commercial vehicle industry witnessed negative growth during 2006-2011; however, over 2012-2017, it is forecast to experience moderate...
Words: 1597 - Pages: 7
...Penetration testing Penetration testing A Hands-On Introduction to Hacking by Georgia Weidman San Francisco Penetration testing. Copyright © 2014 by Georgia Weidman. All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage or retrieval system, without the prior written permission of the copyright owner and the publisher. Printed in USA First printing 18 17 16 15 14 123456789 ISBN-10: 1-59327-564-1 ISBN-13: 978-1-59327-564-8 Publisher: William Pollock Production Editor: Alison Law Cover Illustration: Mertsaloff/Shutterstock Interior Design: Octopod Studios Developmental Editor: William Pollock Technical Reviewer: Jason Oliver Copyeditor: Pamela Hunt Compositor: Susan Glinert Stevens Proofreader: James Fraleigh Indexer: Nancy Guenther For information on distribution, translations, or bulk sales, please contact No Starch Press, Inc. directly: No Starch Press, Inc. 245 8th Street, San Francisco, CA 94103 phone: 415.863.9900; fax: 415.863.9950; info@nostarch.com; www.nostarch.com Library of Congress Cataloging-in-Publication Data Weidman, Georgia. Penetration testing : a hands-on introduction to hacking / Georgia Weidman. pages cm Includes index. ISBN 978-1-59327-564-8 (paperback) -- ISBN 1-59327-564-1 (paperback) 1. Penetration testing (Computer security) 2. Kali Linux. 3. Computer hackers. QA76.9.A25W4258 2014 005.8'092--dc23 2014001066...
Words: 117203 - Pages: 469
...transportation network suffers from several inadequacies and, in particular it has little resilience to deal with unforeseen demands. With the changing economic scenario, factors such as globalization of markets, international economic integration, and removal of barriers to business and trade and increased competition have enhanced the need of transportation. It is one of the most important infrastructure requirements which is essential for the expansion of opportunities and plays an important role in making or breaking the competitive positioning. Increased Producer Prices For many agricultural commodities and low value added manufactures, the costs of transport represent a substantial proportion of total product costs. One study has indicated that, in developing countries, transport costs typically account for between 10% and 30% of final product price. Frequency and reliability of transport also have a very significant impact. Irregular or infrequent transport services require purchasers to hold high levels of stock in order to ensure that they in turn can ensure continuous transport. Transport Sector Transport sector improvements can serve as a catalyst that promotes a virtuous circle of economic development. The reduction in...
Words: 6753 - Pages: 28
...Marketing Management Tata Ace Case Study Solution 1. Analyze the Commercial Vehicle Industry at both Global and Indian scenario? Which are the top 5 countries for CV Industry. Indian Scenario- Indian Commercial Vehicle industry can be mainly segmented into * LCV and * M&HCV industry. LCV consist of three wheelers and four wheelers up to 1 ton capacity. Tata, Bajaj, Mahindra, Force motors and Piaggio are the major players of LCV industry. M&HCV consist of four wheelers such as medium sized pickups, single axle and multi axle buses and trucks. Tata, Mahindra & Mahindra, Eicher, Volvo and Swaraj Mazda are major the players of M&HCV industry. Also, two wheelers, passenger cars and SUV’s were also used for freight transport. Non motorized vehicle sector included bullock carts, bicycle rickshaw, horse drawn carriages, and manual pull carts. The size of the non motorized section was large but undocumented. After many successful years, In India commercial vehicle industry is going through a bad patch due to following reasons- • Economic slowdown • Delay in infrastructure facilities i.e.-Roads Medium and high commercial vehicle industry has seen significant slowdown while LCV industry is still experiencing growth. To overcome the slowdown OEMs have started investing in more research in technology, design, innovation, increasing the reach and increasing the standard of aftersales service instead of investing in expansion of output facilities...
Words: 3116 - Pages: 13
...BSM 7054 – Strategic Management | Case Study - MEASAT | | This case study takes a look at MEASAT, the satellite provider based in Malaysia and what are their challenges and strategic planning taken to take further step in this area of business[2013] | Kaviraj Anandan – 1101600295Ahmad Fairus - | | | Lecturer: Mr. Mohd. Nor Ismail | Graduate Centre for Management ------------------------------------------------- MULTIMEDIA UNIVERSITY TABLE OF CONTENTS Table of Contents 1 Introduction 3 1.1 Company History 3 1.2 Company Overview 4 1.3 Corporate Information 7 1.4 Corporate Vision 7 2 Strategic Analysis 8 2.1 Business Segment 8 2.2 Competitive Landscape 8 2.3 SWOT overview 9 2.3.1 Strength 9 2.3.2 Weakness 9 2.3.3 Opportunity 9 2.3.4 Threat 9 2.4 Business Level Strategy 9 3 Conclusion and Recommendation 15 1 Introduction 2.1 Company History MEASAT, which is derived from the full term of “Malaysia East Asia Satellite” was first develop and launched in 1992 by Binariang Sdn Bhd, to follow suit the then effort of Malaysia’s Prime Minister YA. Bhg Tun Dr Mahathir Mohamed. The purpose of this effort was to develop the communication infrastructure for Malaysia moving into the new millennium. In order to develop and launch Malaysia’s first communication satellite system, Binariang Sdn. Bhd brought together a team of experience and highly motivated experts to get together and share their knowledge and...
Words: 3498 - Pages: 14
...Chegg -- Sign In More Learn about Chegg Study ------------------------------------------------- Top of Form SubmitClose Bottom of Form Free Shipping: Physical textbook orders of $55 or moreSee details Excludes tax and shipping. Expires on 12/15/14. Not to be combined with other offers. Terms of offer are subject to change Code: CHEGGFREESHIPApply Home home / homework help / questions and answers / engineering / computer science / 1. [16 points total, tcp/ip] a. unlike ip fragmentation... Ask a new question? Question 1. [16 points total, TCP/IP] a. Unlike IP fragmentation (which can be done by intermediate devices), IP reassembly can be done only at the final destination. What problems do you see if IP reassembly is attempted in intermediate devices like routers? [8 points] Answer: It's important to understand that while reassembly is the complement to fragmentation, the two processes are not symmetric. A primary differentiation between the two is that while intermediate routers can fragment a single datagram or further fragment a datagram that is already a fragment, intermediate devices do not perform reassembly. There are a number of reasons why the decision was made to implement IP reassembly this way. Perhaps the most important one is that fragments can take different routes to get from the source to destination, so any given router may not see all the fragments in a message. Another reason is that having routers need to worry about reassembling fragments...
Words: 4874 - Pages: 20
...Forensicc studies volatility 1. List the processes that were running on the victim’s machine. Which process was most likely responsible for the initial exploit? Figure 1 seeking the profile As shown in figure one, when the command “vol imageinfo –f /root/Desktop/BF.vmem” is applied, the result shows the suggested profile which is WinXPSP2x86 and WinXPSP3x86.With that we can able to identify the profile victim is using. Figure 2 Result of Pslist By using the “Pslist” command, we are able to trace the process running in the victim and based on the scenario provided, the user was emailed a link to a suspicious PDF by a co-worker. The chaos happened after the PDF file is opened. As shown in figure 2, “AcroRd32.exe” with PID 1752 is most likely responsible for the exploit. The PPID (parent PID) of AcroRd32.exe is 888 which indicate firefox.exe. 2. List the sockets that were open on the victim’s machine during infection. Are there any suspicious processes that have sockets open? Figure 3 Result of listing Sockets Figure 3 shows the list of socket that were opened on the victim’s machine during the exploitation Figure 4 Result of Connection The figure above shows the list of connection found in victim’s machine and the most suspicious connection to external website is the AcroRd32.exe (PID 1752) and svchost.exe (PID 880). These application caught our attention because it does not have any outbound HTTP connections. Figure 5 Information of IP After finding...
Words: 1584 - Pages: 7
...Miniature Aerial Vehicle – Airframe characterization R. Shivkumar, Hemendra Arya & K. Sudhakar Department of Aerospace Engineering Indian Institute of Technology Bombay Powai, Mumbai – 400076 e-mail: arya@aero.iitb.ac.in Abstract: Airframe design is an important step in the development of mini aerial vehicles. Airframe design means the shape and size of the aircraft. Issues related to mini aerial vehicle design are discussed in the paper. In this paper a case study of design of a 0.6 m fixed wing aerial vehicle is presented. This case study also brings out the requirement of various tools to conduct such an exercise. Introduction: Significant interest is being shown by academic institutions in research activities related to Remotely Piloted Vehicles (RPV’s) and Unmanned Aerial Vehicles (UAV’s). Flying platforms and their design with suitable payloads reinforce classroom education while exposing students to a host of flight related problems and issues of systems integration. There has been a long felt need to bring students, especially in the field of engineering, closer to the complexities and risks in dealing with actual systems. The Department of Aerospace Engineering, IIT Bombay has decided to make headway in this direction by developing remotely piloted aerial vehicles as experimental platforms[1]. The various disciplines required for such a design activity are aerodynamics, performance, structures, stability, control and propulsion. Each of these designs are different compared...
Words: 4590 - Pages: 19
...I. ------------------------------------------------- Chapter 2: Context and Background I n this chapter, we introduce the main concepts related to the problem we are addressing, in order to provide the casual reader with the necessary background information for this dissertation. As the title of this thesis is “Analysis of Security and QoS in Network with time constraints”, it is clear that our work requires a deep understanding of three main topics: security, Quality of Service (QoS) and network applications with time constraints. These three fundamental topics will be addressed in this chapter. 2.1. Security In today's business environment, users demand seamless connectivity and stable access to servers and networks wherever they are: hotels, airports, homes, or remote offices. While these functionalities are useful for business, they can only be diffused as such if we can minimize the security risks of transmitting sensitive data across the Internet. 2.2.1. Security Definition (Security Properties) Protecting information from unauthorized access, use, disclosure, disruption, modification, inspection, recording or destruction in order to provide confidentiality, integrity, and availability is the main goal of information security [NIST 2009]. Security is the ability of a computer system to withstand external physical stresses (fire, flooding, bombs, etc.) or logic (input errors, intrusions, hacking, malicious logic, etc.); this is generally the direction...
Words: 8305 - Pages: 34
...CHaPTer Firewall Fundamentals 2 T O SOME NETWORK ADMINISTRATORS, A FIREWALL is the key component of their infrastructure’s security. To others, a fi rewall is a hassle and a barrier to accomplishing essential tasks. In most cases, the negative view of fi rewalls stems from a basic misunderstanding of the nature of fi rewalls and how they work. This chapter will help dispel this confusion. This chapter clearly defi nes the fundamentals of fi rewalls. These include what a fi rewall is, what a fi rewall does, how it performs these tasks, why fi rewalls are necessary, the various fi rewall types, and fi ltering mechanisms. Once you understand these fundamentals of fi rewalls, you will able to look beyond the unschooled opinions, common mythology, and marketing hype surrounding them, and the crucial benefi ts of effective fi rewall architecture will become clear. Like any tool, fi rewalls are useful in solving a variety of particular problems and in supporting essential network security. Chapter 2 Topics This chapter will cover the following topics and concepts: • What a fi rewall is • Why you need a fi rewall • How fi rewalls work and what they do • What the basics of TCP/IP are • What the types of fi rewalls are • What ingress and egress fi ltering is • What the types of fi rewall fi ltering are • What the difference between software and hardware fi rewalls is • What dual-homed and triple-homed fi rewalls...
Words: 15354 - Pages: 62
...------------------------------------------------- Unmanned aerial vehicle From Wikipedia, the free encyclopedia "UAV" redirects here. For the entertainment company, see UAV Corporation. For the veterans' organization, see Ukrainian American Veterans. A group photo of aerial demonstrators at the 2005 Naval Unmanned Aerial Vehicle Air Demo. An unmanned aerial vehicle (UAV), commonly known as a drone, is anaircraft without a human pilot onboard. Its flight is either controlled autonomously by computers in the vehicle, or under the remote control of anavigator, or pilot (in military UAVs called a Combat Systems Officer on UCAVs) on the ground or in another vehicle. There are a wide variety of drone shapes, sizes, configurations, and characteristics. Historically, UAVs were simple remotely piloted aircraft, but autonomous control is increasingly being employed.[1] Their largest use is within military applications. UAVs are also used in a small but growing number of civil applications, such as firefighting or nonmilitary security work, such as surveillance of pipelines. UAVs are often preferred for missions that are too "dull, dirty, or dangerous" for manned aircraft. Contents [hide] * 1 History * 2 FAA designation * 3 Classification * 3.1 Classifications by the United States military * 3.1.1 US Air Force tiers * 3.1.2 US Marine Corps tiers * 3.1.3 US Army tiers * 3.1.4 Future Combat Systems (FCS) (US Army) classes * 3...
Words: 10057 - Pages: 41
...CHaPTer Firewall Fundamentals 2 T O SOME NETWORK ADMINISTRATORS, A FIREWALL is the key component of their infrastructure’s security. To others, a fi rewall is a hassle and a barrier to accomplishing essential tasks. In most cases, the negative view of fi rewalls stems from a basic misunderstanding of the nature of fi rewalls and how they work. This chapter will help dispel this confusion. This chapter clearly defi nes the fundamentals of fi rewalls. These include what a fi rewall is, what a fi rewall does, how it performs these tasks, why fi rewalls are necessary, the various fi rewall types, and fi ltering mechanisms. Once you understand these fundamentals of fi rewalls, you will able to look beyond the unschooled opinions, common mythology, and marketing hype surrounding them, and the crucial benefi ts of effective fi rewall architecture will become clear. Like any tool, fi rewalls are useful in solving a variety of particular problems and in supporting essential network security. Chapter 2 Topics This chapter will cover the following topics and concepts: • What a fi rewall is • Why you need a fi rewall • How fi rewalls work and what they do • What the basics of TCP/IP are • What the types of fi rewalls are • What ingress and egress fi ltering is • What the types of fi rewall fi ltering are • What the difference between software and hardware fi rewalls is • What dual-homed and triple-homed fi rewalls...
Words: 15354 - Pages: 62
...Table of Contents Page Executive Summary 2 Introduction 2 Mission 4 Conclusion 15 References 15 Table of Figures Figure 1 GSV 5 Figure 2 Refueler and Depot 7 Figure 3 Refueling Scenario 8 Figure 4 RSV 14 Table 1 Distribution of active satellites 4 Table 2 GEO Servicing opportunities 4 Table 3 GSV mass breakdown 6 Table 4 Power Budget 9 Table 5 Cost of Refueler/Depot 11 Executive Summary Launching a satellite into space with a mission to service other satellites is a plausible idea. Servicing a satellite means to somehow make it so a satellite’s design life is lengthened. This can be accomplished by refueling, assisting in orbit placement, and/or performing mechanical repairs. Satellite servicing has been done already in the past during manned space missions. The problem arises when the attempt is to be made on satellites outside of human intervention like those in High Earth Orbits (HEO). The ESA and d NASA have both put forth their ideas on how to service satellites in space. The Refueler/Depot idea suggested by NASA has the plan to launch a large satellite into space in two parts. One part is the Refueler, which is agile and movable and can dock with cooperating satellites. The other half is the Depot which stores the hydrazine fuel but remains in a constant orbit above the GEO belt. ESA’s idea is of a single satellite that will...
Words: 3903 - Pages: 16
...UNIVERSITY OF PETROLEUM & ENERGY STUDIES DEHRADUN Group Project RAILWAY LOGISTICS (HEAVY HAUL TRAIN OPERATIONS) RESEARCH METHODOLOGY (MBCQ 721) Submitted to: Dr. NEERAJ ANAND Associate Professor& HOD – QT/RM/Operations CMES Submitted by : Name: AmolKhare Roll No: R600212004 Name: Ruchika Sahu Roll No: R600212039 Name: Rahul Kushwah Roll No: R600212031 MBA (LSCM)Sem II Batch 2012-14 Railway Logistics (Heavy Haul Train Operations). Page 1 ACKNOWLEDGMENT Our deepest thanks to, Dr Neeraj Anand, Associate Professor & HOD–QT/RM/Operations for College of Management and Economic Studies, as a guiding hand for us. He has taken pain to go through the project and also had spent time in giving necessary suggestions as and when needed. We would like to express our gratitude towards Mr R K Khare, Assistant Design Engineer, Track Department, of Research Design and Standard Organisation, Lucknow. Thereby our parents & classmates for their kind co-operation and encouragement which helped us in the completion of this project framework. We would like to express our special gratitude and thanks to industry persons for giving us such attention and time. Our thanks and appreciation also goes to the colleagues in developing the project and people who have helped us out with the different aspects of this Project. Date: 23, April 2013 Names: Amol Khare Rahul Kushwah Ruchika Sahu Railway Logistics (Heavy Haul Train Operations). Page 2 INDEX Sr. No. Topic Page No. 1...
Words: 17420 - Pages: 70
