A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
CHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectednd precise objectives of this work. Il equally presents the scope as well as the significance of the study.1.1 Background of the studyThe proliferation of wireless mobile devices has revolutionized the world, leading to the popularity of the mobile ad hoc networking technology [1]. This emergence of A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected the mobile ad hoc network (MANET) has facilitated the drift from personal computing to ubiquitous computing in our society. Today, mobile devices sucA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
h as smartphones, laptops, notebooks and tablets are fast becoming an integral part of man’s life and a good number of those in the academia and indusCHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected collection of wireless mobile devices that communicate and cooperate with each other in a distributed manner in order to provide the necessary network functionality in the absence of a fixed infrastructure [3]. It consists of a group of independent network mobile devices that are linked over variou A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotecteds wireless links. Normally, mobile ad hoc networks operate on a constrained bandwidth, have dynamic network topologies and enable devices to seamlesslA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
y link up without pre-existing communication infrastructure. Due to the ease and speed with which MANETs are established, they are widely used anytimeCHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedeen gainfully employed in University campuses, airports, hotels and conference settings because they facilitate collaboration and provide efficient communication. Consequently the opportunities due to the application of MANETs are enormous. On the other hand, they have high risks and possibilities o A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedf attacks, therefore security issues impose various challenges to the application of mobile ad hoc networks. Besides, securing, this network has becomA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
e even more intricate due (0 the fact that mobile devices constituting MANETS, have limited processing and memory' resources [5].The fact that MANETs CHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedhentication and encryption developed for the protection of mobile ad hoc networks are insufficient for operating in mobile ad hoc networks 16].As the importance and intricacy of MANETs increases, more complex and distributed attacks continue to emerge. One of the most widespread network attacks that A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected poses a grave danger and hampers the application of the mobile ad-hoc network is the denial of service (DOS) attack. A denial of service attack is anA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
explicit malicious attempt to render a service, system or network unusable by its legitimate users [7J. This attack can lead to the clogging up of soCHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedm multiple sources, it is referred to as a Distributed Denial of Service (DDOS) attack [8]. By using2multiple attack sources, the power of a DDOS attack is amplified and the problem of defense is made more complex. The impact of DDOS attacks can vary from minor inconvenience to users of a web site t A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedo severe financial losses for institutions that rely on their online availability to carry out their businesses.In contrast to other forms of intrusioA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
n, a denial of service attack does not require the attacker to gain physical access or entry into the targeted server. Typically, a DDOS attack is cooCHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedrge number of hosts, without their owners’ knowledge, and install software that will later enable the coordinated attack. These compromised hosts, called zombies, are then used to perform the actual attack [9].Distributed denial of service attacks exhaust host resources; take up a lot of bandwidth, A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedmaking the victim host unable to accept normal network requests, resulting in substantial economic losses. In a typical DDOS attack, a huge number ofA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
compromised hosts are amassed to send useless packets to the victim, which is deprived of gaining access to the Internet or its resources. DDOS attackCHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedto curtail such losses by countering DDOS attacks.A denial-of-service (DOS) attack directed against one or more network resources often floods the target with an overwhelming number of Synchronous (SYN), Internet Control Message Protocol (ICMP), or User Datagram Protocol (UDP)3packets or with an ove A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedrwhelming number of SYN fragments. Depending on the attackers’ intent and the extent and success of previous intelligence gathering efforts, the attacA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
kers might single out a specific host, or might aim at random hosts across the targeted network. Either approach has the potential of upsetting the seCHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedur by the world's largest DDOS mitigation service, known as the Prolexic Company, indicates that majority (90-94%) of DDOS attacks are performed using Transmission Control Protocol. In the first quarter (QI) of 2012, attackers used more network layer attacks than application layer attacks (Layer 7). A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected The three most common forms of DDOS attacks are Transmission Control Protocol Synchronous (TCPSYN) floods. User Datagram Protocol (UDP) floods and InA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
ternet Control Message Protocol (ICMP) floods. Typical application layer attacks are GET Floods and POST Floods. According to the figures provided by CHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedternet occurred in August 1999 on a network used by faculty and students at the University of Minnesota. This attack shut down the network for more than two days [12). Currently, a good number of educational institutions who provide Internet access still experience frequent downtime due to DDOS atta A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedcks.Hence, the convenience of the Internet comes at the cost of various security risks. In other words, while the Internet has facilitated the provisiA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
on of crucial services in4https://khothuvien.cori!educational and financial institutions, it has equally served as a means of diffusing network attackCHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected accommodating the influx of staff, students' and faculty devices [13].In spite of the fact that several efforts have been made to design intrusion detection systems for MANETS, yet most of these approaches have neither been effective nor reliable and have been unable to adequately consider the requ A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedirements for a mobile ad hoc network. Thus, while many intrusion detection schemes exist, yet their effectiveness leaves much to be desired.Related liA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
terature have shown that conventional intrusion detection systems developed for wired networks are not well suited for MANETs and have a number of draCHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedtacks and protecting the access of legitimate users to networks has attracted attention from both the industry and (he academia.On the other hand, multi-agent systems [15] and data mining [16] have emerged as promising fields of research for developing distributed intrusion detection systems. Studie A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotecteds have shown that these technologies have the potential to improve the performance of intrusion detection systems and thus can be employed in the deveA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
lopment of intrusion detection systems.5https://khothuvien.cori!In this ubiquitous age, where nearly everyone owns at least one mobile device [17], thCHAPTER 1: INTRODUCTION1.0 IntroductionThis chapter is an introduction to the research work; it gives an overview of the problem statement, the aim an A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected. Based on the fact that these mobile devices are further expanding in their abilities to intercommunicate, simple static methods are no longer adequate in providing security to these computational scenarios.Consequently, this thesis presents a distributed intrusion detection system that integrates A_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotectedthe desirable features of the multi-agent methodology with data mining techniques in order to make the intrusion detection system more autonomous andA_Review_of_Intermediate_Ecumenical_Life_in_England_August_2011Word_unprotected
efficient.In order to address the snags in existing intrusion detection systems, cooperative, distributed intrusion detection architecture that takesGọi ngay
Chat zalo
Facebook