Dissertations / Theses on the topic 'Campus network design'

The aim of this thesis project to design and implement a campus network based on IPv6, as IPv6 is the protocol of the future communication.There are many papers available which discuss upgrade from IPv4 to IPv6 and their side by side implementations and functionalities. Contrary to this we are working on running a network entirely based on IPv6. So we built this network infrastructure, monitored it and tested it.A network working on IPv6 is not just about a different addressing plan. Rather there are some serious questions. Network administrators are quite happy and comfortable with the current setup of IPv4. Would this IPv6 be able to provide them same facilities on one-to-one basis? If not, would it be upgrade or degrade on some functionality? Is there solution to every problem available or they would have to discover it themselves? All these and many more questions were faced and tackled in the course of this thesis.

Security is at the front line of most networks, and most companies apply an exclusive security policy enclosing many of the Open Systems Interconnection (OSI) layers, from application layer all the way down to Internet Protocol (IP) security. On the other hand, an area that is often not protected with high level of security is the second layer of OSI model and this can compromise the entire network to a diversity of attacks.This report presents an experimental performance analysis within the real environment. It focuses on understanding and preventing the Man-In-The-Middle (MITM) also known as Address Resolution Protocol (ARP) Poisoning on the Cisco Catalyst 3560 series switches with Cisco IOS Software. The Linux Command Line (CLI) tools and Ettercap tool were used to launch the Layer 2 attacks that you might come up against. Mitigation methods to stop this attack are evaluated and concluded. Finally we will answer if Secure Socket Layer (SSL) is enough to protect the users’ data against MITM in the network.A HP laptop and two DELL PCs were utilized for these tests and acted as the attacker, the Server and the victim. Victim PC runs Windows 7, attacker’s Laptop and server run Linux.Finally, three different case studies were analyzed and compared with each other and different solutions that might help to solve or detect the issue of MITM attack are concluded.

Over years, there have been tremendous changes in internetworking technologies and there are a number of real time applications that are flooded into the market. Most real-time applications are sensitive to traffic loss because of their nature of exchanging data without acknowledgement. In any type of data network, redundancy is important to backup and recover the connectivity without human intervention in case of device or link failure. However, it is very crucial to design an optimal redundant network, particularly for real-time applications providing minimal losses during fail-over. Configuration of redundancy in different networks varies and depends on the equipment and network design itself.

This thesis focuses on the redundancy needed in campus network design which is quite popular nowadays in most of medium and large enterprises, universities or government agencies. Two major designs of redundancy are studied: default gateway redundancy and routed access. In the first option, the one logical segment of network uses common L2 switches while in the other – the same segment is constructed with more expensive advanced multilayer switches. The network is built in the lab environment. As an example of real-time communication the VoIP call is simulated in the network. The failures on different areas of nodes or links are caused manually. Results of packet loss during fail-over are recorded. The baseline of recovery performance is constructed using these results which are derived from different scenarios using different configurations and equipment. The baseline data is evaluated and conclusion is made on the trade-offs, limitations, advantages and disadvantages of the redundancy options in the campus network design.

The work done in this thesis is supportive for network architects and designers to take into consideration the equipment and configuration to be used when implementing redundancy for real-time communications. The results and conclusion will support them in choosing the options for constructing the redundant network, or taking into account the trade-offs when migrating from one option to another.

This dissertation is concerned with the design of a high speed fiber optic campus backbone network which not only provides a high bandwidth connection to various LANs, PBXs, ISDNs, supercomputers, and other high speed computing facilities but also offers an integrated service of voice and data. The campus backbone network is based on an optical fiber dual ring structure. A new token ring protocol based on the IEEE 802.5 standard is proposed as the medium access protocol for the backbone network. In the proposed token ring network, the token holder transmits packets in an exhaustive way when no other nodes want to transmit voice packets. If any node has voice packets waiting for transmission, the token holder can transmit only a single packet during its access opportunity. In this way, not only can the voice delay be bounded at high voice traffic intensities, but a high data throughput can be achieved at low voice traffic intensities. The potential use of Time Division Multiplexing (TDM) was also considered, but the TDM technique was found to be less suitable for our campus environment mainly due to its low efficiency in bursty environments and complex hardware requirements. The backbone network was simulated using the Simscript II.5 discrete event simulation language. The simulation results indicated that the proposed token ring protocol provides satisfactory performances in every respect. A network interface unit (NIU) was designed, which consists of optical transmitter, receiver, and fault tolerance mechanisms as well as the protocol engine. The optimal values of major parameters for the NIU design were determined by the simulation.

Travaux portant sur l'integration de postes de travail heterogenes tant au niveau materiel que logiciel en un reseau ethernet. Presentation des facteurs conduisant a la conception de coupleurs. Integration logicielle d'un coupleur de communication. Proposition d'une architecture pour l'implantation

碩士
中國文化大學
資訊安全產業研發碩士專班
99
The campus broadband network is already very popular, students use campus network to learn, research, and data search and other applications. Campus network through a lot of students often access data on the network, especially peer to peer technology (peer-to-peer, P2P) software, often a user might take up most of the network bandwidth or PC ARP virus infection, leading to network all the computers can not access and network attacks cause future difficulties in tracing the impact of network security issues, will be the schools in a major worry and to be resolved problems. In this research, using the iptables firewall module, PHP web programming, and MySQL database and other software programs based on Linux operating system, build a network management system to prohibit illegal IP / MAC Address Access network resources in schools and a large number of students take up network bandwidth network traffic control, the system provides the precise and accurate control mechanisms to prevent abuse of the campus network, occupied bandwidth, and derivative security and other related issues, to enhance the campus network performance and connection quality.

碩士
國立交通大學
電機資訊學院碩士在職專班
92
With the developments in information and communication technology—network system in particular, the promotion of computerization on campus (“e-campus”) and the emphasis on the integration of information technology into instruction and school administration have already become essential over the last two decades. Further still, with the latest advancement in mobile wireless network system, the accessibility in information requested and the application in multimedia also inspire the issue, “mobile learning (m-learning).” On the basis of network environment, the Campus Mobile Management System (CMMS) sets up Web, SQL, Mail, and Short Message Service Server (SMS Server). In addition, mets the target of multi-platform by using ASP.NET to design the application programs to offer the Client. SQL Server not only can promote the function of access but also can increase the flexibility of this system in the future. Thus, Mail Server and SMS Server are used to deliver information. With the conception of Digital Nervous System, the system can receive all kinds of information through Client. For example: the teacher will be record a student when he (she) is absent. And system will automatically contact his parent, instructors by E-Mail or Short message. The Campus Mobile Management System, developed upon such idea, enables to integrate all of the information on campus, including academic affairs, student affairs, general affairs, and personnel. Furthermore, designed with the single unanimous interface, the system will be much easier for individual users to update their information continually to satisfy the demands of their jobs. In terms of instruction, through digitalized information of electronic mail and instant messages processed by CMMS, the communication and interaction between school and families will be much more efficient. Also, with the combination of network system and mobile communication technologies, lower costs and great efficiency, both in administration and instruction, should be the exploited as potential practice of the mobilization on campus (“m-campus”).

碩士
國立臺灣大學
電機工程學研究所
89
There exists unreasonable and unfair usage of campus network because of almost free usage and lack of effective usage control mechanism, which leads to poor network performance and service quality. Take the example of dormitory network in National Taiwan University (NTU). A small number of heavy-loading users occupy a big portion of the bandwidth most of the time. The majority of users have to tolerate long delay and high packet loss caused by congestion. How to exploit the advancements of network technology for effective management of congestion and fairness in campus network is an important and challenging research problem. The focus of the thesis is on developing a network experiment environment to support the following network management research topics: the introduction of prioritized services, the study of user demands, priority control, peak-load pricing policy, and bandwidth allocation. We integrate current campus network environment of NTU into a simple experimental platform, named virtual Internet pricing system, which offers a prioritized service of two or three classes. In our design of this virtual Internet pricing system, no changes are needed on existing dormitory network protocols and applications. In our design, we evaluated and selected a QoS router for achieving prioritized service and bandwidth allocation, and determined the method of network flow metering and information item of accounting for studying user-demands and responses to management policy. We also determined the user interface and accounting/charging operations for usage-based pricing policy. Users can learn about the objectives of experiment and related information through a well-designed user interface. Based on the design rules, the system proposed by this thesis consists of five parts: a metering router, a meter reading server, an accounting/charging and traffic control server, a quality of service router and an user interface server. In the implementation over multiple operation systems, the metering router is built on a Cisco router with a NetflowTM metering tool installed on it. The meter reading server operates on a FreeBSD operating system, which reads individual flow information from NetflowTM. The accounting/charging and traffic control server operates on a Linux operating system with MysqlTM database system, which stores all accounting and pricing record tables. This server controls the QoS router remotely. The QoS router is designed over the FreeBSD operating system by Prof. Yea-Li Sun and her students. It supports prioritized service and bandwidth allocation function. The user interface server is built on Window2000TM with IIS5.0TM installed and ASP supported. It dynamically generates web pages that reveal network information and setup pages to users. We tested this virtual Internet pricing system and analyzed its performance and the correctness in collecting statistics. In system performance evaluation, results meet our design requirements. In collecting user statistics, we found that user usage may exceed the volume quota allocated because of the low sampling frequency in metering. We also analyzed system scalability. Experiment data show that accounting/charging processing time linearly increases with the number of users. We also discussed about how the sampling frequency should be adjusted in a campus network. Finally, we assessed the CPU loading for a QoS router CPU load and the memory requirement.

As models and methods of educational pedagogy are altered by social media and digital technology, so too are the spaces where learning takes place. Creative education, particularly the education of design students, does not fit into the “typical” higher education classroom, and therefore requires a different physical setting. Despite changes in learning styles, there are many unchanged traditions and functions of the physical setting of design education. The lack of changes has continued to isolate architectural education from the real, urban experience of the city. This practicum aims to address these issues by proposing a satellite campus in an authentic urban environment for the University of Manitoba’s Faculty of Architecture students and teachers. I will investigate theories regarding emerging trends in higher education, the importance of place in education, and the process of educating designers. Throughout this investigation, emphasis is placed on creativity, collaboration, and flexibility in design education.

碩士
國立雲林科技大學
資訊工程研究所
94
Accelerated growth in Internet bandwidth and Internet users have increased network management complexity. This issue is more pronounced in campus networks as the scale of such networks has increased dramatically. As a result of computer viruses and abnormal peer-to-peer users, some computers use a substantial amount of network bandwidth. Therefore, normal users are probably unable to obtain the correspondent quality service when using the networks. This situation can be considered an unfair allocation of bandwidth. This work proposes a novel layer-based network bandwidth management framework that significantly decreases implementation complexity, achieves fair bandwidth allocation and resolves problems associated with stolen IP addresses. Based on existing campus networks, three components are utilized— traffic measurement, user authentication server, and edge gateway—to offer cost-effective network management. The proposed framework tracks user logins, and, with information gathered by monitoring network packets, the amount of bandwidth consumed by each user and that by each subnet is estimated to provide class-based bandwidth management and subnet-level fair bandwidth allocations. Simulation results demonstrate that the proposed framework achieves fair bandwidth usage in the subnet and backbone.

碩士
國立中興大學
資訊科學與工程學系所
98
The common network bandwidth using problems under a campus network environment are as follows: (1) the bandwidth resources abuse caused by P2P users, (2) the use of the real-time services is unsatisfactory without bandwidth guarantee, and (3) many people are surfing the internet at the same segment at the same time, resulting in the bandwidth of lower priority users is preempted; presently, the generally used bandwidth management method can not solve the above-mentioned problems effectively. The dissertation proposed the bandwidth management framework based on user clustering, divided the users into three categories, gave the users of each category different guaranteed bandwidth and priority via three bandwidth management devices, adopted the admission control mechanism to ensure that the users who are already online can get the minimum guaranteed bandwidth, and the excess bandwidth can be borrowed dynamically among the subnets by means of bandwidth borrowing algorithm. The system implementation showed that it can restrict P2P users effectually, provide the minimum bandwidth guarantee for the real-time service and the low priority users that are already online, and promote the bandwidth utility rate efficaciously through the implementation of excess bandwidth borrowing among subnets.

Record keeping and management of electrical utilities inside buildings is an important aspect to ensure effective electrical distribution. The ability to find the location of each electrical feature inside a building and extract information about it helps to solve network problems faster. The use of a spatial database structure facilitates the maintenance and general operations of an electrical network across different buildings. The aim of this study is to design and develop a 3D data model to provide a management system for electrical utilities inside buildings. The geodatabase provides integrated information between different electrical components forming the network inside the specified buildings in the study area. A prototype called the PUK geodatabase was designed and developed for the NWU Potchefstroom Campus as a 3D data model. The data model consists of raster and vector data used in network datasets, relationship classes and topology rules. The aim of this project was accomplished through the 3D analysis capabilities of the model. The research determined that the prototype called the PUK geodatabase can be utilized as a 3D management system for electrical utilities across the different floor levels of a building.
Thesis (M.Sc. (Geography and Environmental Studies))--North-West University, Potchefstroom Campus, 2012

碩士
國立臺北科技大學
電機工程系
106
Applying the technology of Internet of Things (IoT) to city management has become a popular trend under globalizing urbanization. Most of the cases are applied to themes of houses, transportation and health care. Sustainable management and environmental impact became urgent issues due to the fact of increasingly serious global warming and climate change phenomena. Nowadays, studies of Smart Environment gained more attention; however, most of the studies focus on managements of negative impacts such as monitoring air pollution and water contamination and therefore lacking the continuingly monitoring of positive constructions such as examining the performance of Urban Resilience, Sponge City and Low Carbon Communities. To establish a smart environment, green engineering and data analysis should not be ignored. Based on the above broad perspective, the study aims at developing the cross board research combining the field of civil engineering and the electrical engineering and providing a feasible managing green engineering information system by applying the technology of IoT to monitor the urbanizing green constructions based on the technology of multi-functioned module consisting front end sensor network, middle end wireless transmission and back end cloud management. The research analyzes the ambient temperature, humidity and power generation under different background characteristic of times based on the evaluation system of green constructions. By discussing the efficiency of energy saving in green roofs, permeable pavements and PV roofs, the result of the research is able to be taken as a reference in urban governance in calculation and evaluation of energy saving and carbon reduction.

碩士
國立高雄科技大學
資訊管理系
107
Bluetooth Special Interest Group (Bluetooth SIG) has released Bluetooth mesh network specification with many-to-many and multiple hops for building automation and smart cities. However, some research show that Bluetooth mesh has a limitation of the technology. In Bluetooth mesh networks, the data need to be transmitted to others by the relay nodes. Because the relay nodes frequently transmit data, is makes a large of power consumption. For this reason, a Bluetooth mesh network is not suitable to be only constructed by power-limited nodes. In this study, we try to solve the power consumption problem of Bluetooth mesh network. For reducing the total network power consummation to increase the lifetime, the solution that decreasing number of data transmit times is proposed. We design and implement a Bluetooth Mesh stack-based SOS system with sector clustering network, and it is experimented to prove in the campus. In this experiment, a network is divided in to some different cluster levels, and elect appropriate cluster header by link dispersion and electricity of nodes. The experiment result shows this research is better than the standard Bluetooth mesh on power saving.

碩士
國立臺灣大學
電信工程學研究所
96
In recent years, wireless networks have grown rapidly and 802.11a/b/g technologies have been widely employed. Many telecom operators, universities and households deploy their own wireless access points. Because of the short coverage of WLAN access points and the high operating cost, telecom operators in different countries often establish business relationship to form roaming alliances and then their users can roam to wireless networks of different operators. In Taiwan, main universities have formed a roaming alliance to help their teachers and students to enjoy roaming service at other campus. However, there exist business cooperation problems between campus networks and operators’ wireless networks, so that at this stage campus users still cannot roam to hot spots owned by business operators and vice versa. This research aims to establish a credit system between campus networks and operators’ networks to resolve the problems above. Each wireless network system can categorize their users into original users, and then employ the Game Theory to provide different users with appropriate transmission rates. This research proposes to use utility function to reflect the satisfaction level and analyze the results of roaming agreement by means of simulation. Also, the impact factor, such as advertising benefit and operation models, are also included in the feasibility study of roaming agreement. We hope this research can be instrumental to the establishment of wireless network roaming agreement and improves network resource efficiency in the long term.