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Utilization of Software Exchange in Laboratory Education
Komárek, Milan ; Endrle, Pavel (referee) ; Škorpil, Vladislav (advisor)
The main aim of this bachelor thesis is the use of a switchboard in laboratory exercises. The first section describes the SIP signalling protocol, its components, addressing and messages. In the second part there are designed three laboratory tasks. The first laboratory task is focused on connecting 3CX switchboard and Cisco router using a SIP Trunk. This describes the configuration of the switchboard, Cisco router and IP phones. The second laboratory task verifies the function of data transcoding in a 3CX switchboard. That includes an analysis of voice connection of participants working with a different codec. The third laboratory task tests specific functions provided by the 3CX switchboard.
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Current trends in the security of Wi-Fi IEEE 802.11 networks
Blažek, Ondřej ; Škorpil, Vladislav (referee) ; Endrle, Pavel (advisor)
This work describes security options of 802.11 standard. Principle of WEP algorithm is described here, problem with his inicialization vector which leads to a statistical attack and revelation of his secret key. Moreover other principles of algorithms such as WPA, WPA2 are explained here along with a practical demonstration of bruteforce attack in a practical part of the thesis. Also the influence of encryption on network throughput is tested here using tool Iperf.
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Modelling Power Line Communication using Network Simulator-3
Pánek, Jiří ; Endrle, Pavel (referee) ; Mlýnek, Petr (advisor)
The semestral thesis deals with power line communication and its simulation in Network Simulator-3. The first part includes a general description of PLC, summarizes its division and the relevant standards. The next part describes graphical user interface, its options and several simulation topologies. The third part is a description of each simulated examples in NS-3 and proposal for their extension. It also includes analysis of the types of interference in PLC and partial extension.
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Modern trends in Wi-Fi IEEE 802.11 networks security
Lieskovan, Tomáš ; Škorpil, Vladislav (referee) ; Endrle, Pavel (advisor)
This work treats the matters of wireless networks, Wi-Fi. The paper describes the various principles of coding, such as WEP, WPA and WPA2. At first the WEP security method is analyzed with the view of the fact that it doesn´t meet contemporary safety requirements, further its successor WPA, namely TKIP and AES authentication methods, and last but not least WPA2 which nowadays serve as a safety standard. The work assesses the safety risks of individual security methods and makes several recommendations to achieve maximum security for wireless networks. In the work a commercially available hardware and for free dissemination available software (Open Source) are used.
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Advanced features of traffic shaping for 802.3 and 802.11 networks under OS Linux
Pánek, Michal ; Endrle, Pavel (referee) ; Szőcs, Juraj (advisor)
This bachelor work deals with possibilities of traffic shaping and control in OS Linux. First part of the work examines indiviual tools needed for working with data stream. The second part consideres methods intended for traffic shaping. From these methods intended for use in standarts 802.3 and 802.11 were selected and described. The second part of paper focused on Hierarchical Token Bucket and Class-based queueing method. The third part is the practical application of methods on the hardware, the measurement of the individual standards and processing into charts.
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Simulation of Data Transmissions in Integrated Networks
Rozsypal, Pavel ; Endrle, Pavel (referee) ; Škorpil, Vladislav (advisor)
The goal of this assignment was to analyze the issue of data transfer in integrated networks focusing on quality of service. The thesis describes the various network elements, their function, advantages and disadvantages. Attention was also paid to neural networks, with a focus on the analogy between biological neuron and the artificial neuron. Another part of paper was dedicated to the simulation possibilities of these network in MATLAB. To simulate the behavior of network elements was used OPNET IT Guru software.
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Laboratory exercise "OpenVPN virtual networks"
Kortus, Jiří ; Endrle, Pavel (referee) ; Burda, Karel (advisor)
This thesis describes the principles of virtual private networks (VPN) and briefly mentions the main protocols and methods for VPN deployment. After that, it aims on a more detailed description of the OpenVPN characteristics. It describes its properties and possibilities and discusses their advantages and disadvantages. In the following part, it focues on a laboratory exercise concerning OpenVPN deployment. It discusses the possibilities of the laboratory exercise design mainly from the technical and didactic point of view. Considering them, a concept of the exercise with one OpenVPN server and one client is presented. The exercise simulates a solution of a practical, commonly emerging problem with unwanted Internet access restrictions caused by misconfigured or too restrictive firewalls. The concept comprises both theoretical part and directions, as well as images of the virtual machines used in the exercise. In addition, different possibilities of a further expansion of the exercise or its use as a base for another exercise are mentioned.
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Modern network security trends of 802.11 standard
Ševčík, Lukáš ; Burda, Karel (referee) ; Endrle, Pavel (advisor)
Táto bakalárska práca sa zaoberá zabezpečením standardu 802.11. V úvode práce je detailne popísaný tento štandard a jeho jednotlivé zložky. V ďalšej časti sú popísané možnosti jeho zabezpečenia a prípadné nedostatky v nich. V práci sú uvedené praktické ukážky vybraných útokov. A na konci zhodnotenie momentálneho stavu a možnosti ako sa vyhnúť slabinám v týchto zabezpečeniach.
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Customer Satisfaction Analysis and Proposals for its Improvement
Endrle, Pavel ; Kostková, Věra (referee) ; Jaroš, Jiří (advisor)
This master's thesis analyzes customer satisfaction of specific company and defines the methods and recommendations for improvement based on this analysis. Theoretical part is aimed at describing methods used in the analysis of satisfaction, which are then used for main research in the practical part of thesis. Methods and actions designed to increase customer's satisfaction based on main analysis of described company are proposed in practical part of thesis.
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