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Design of internet service provider data networks
Vodehnal, Stanislav ; Urban, František (referee) ; Novotný, Vít (advisor)
This bachelor thesis deals with techniques for designing data networks. They described a group of protocols STP and virtual networks VLAN that are still getting a lot of use. They are further described advanced techniques for the design of data networking protocols such as PB, PBB and SPB. Conclusion of work is a laboratory exercise dealing with the VLAN and QinQ.
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Optimizing Network Fritzmeier Vyskov Ltd.
Hála, Robert ; Hažmuk, Ivo (referee) ; Ondrák, Viktor (advisor)
The content of the thesis is the optimisation of computer network of the engineering firm Fritzmeier Vyškov. The aim of the thesis is a complete revision of the existing State of cable distribution and active devices. Assessment of the status and the theoretical background of the solution. Proposal for a solution to the optimisation of computer networks, according to the applicable standards. The output of the thesis is a proposal for changes in the field of passive and active devices of a computer network. Implementation of an application for the Administration and management of network resources. A proposal for the Elimination of flaws and recommendations for the future development of other areas of the computer network.
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Optimization of Ethernet network in manufacturing plant
Kratochvíl, Petr ; Kubánková, Anna (referee) ; Krajsa, Ondřej (advisor)
This diploma thesis describes the work performed in the optimization of the corporate network in the company Alps Electric Czech to expand the amount of information obtained about the state of the network and thus improve the response of the IT department to potencial errors. During the optimization, a monitoring system was also deployed and its connection to the helpdesk and a tailor-made website running on the Flask microframework. With the gradual deployment, adjustments were made based on feedback from the IT department staff. Overall, the network has become more clarified, increasing the efficiency of maintenance and service.
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Integration of services in industrial Ethernet networks
Mytyska, Kamil ; Horváth, Tomáš (referee) ; Filka, Miloslav (advisor)
This bachelor thesis deals with industrial Ethernet. Industrial Ethernet refers to the usage of standard Ethernet protocols using rugged connectors and heat-resistant switches in industrial automation and process control. Components used in industrial environments must be resistant to high temperatures, dust, humidity and vibration. The usage of optical fibers in industrial environment reduces the problems of electrical noise and provides electrical isolation to prevent equipment damage. The first part describes the physical implementation of Industrial Ethernet, the physical implementation of other components, Ethernet system features real-time, overview of standards and usage of virtual networks. The work is processed with solutions integrating multiple disparate services in one industrial Ethernet network using VLAN. This is processed by using of simulation program Packet Tracer and then the solution is processed in real network connection with three borrowed industrial switches Moxa, B&B Electronics and Ruggedcom. Further there is processed operation during the communication between devices using Wireshark which describes the TCP connection, sending an HTTP packet and a separate data transfer. As the last part there is mentioned evaluation of five industrial switches from companies B&B Electronics, Cisco, Moxa, N-Tron and Ruggedcom.
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Penetration testing of ANC
Dušek, Jakub ; Jakub,, Přibyl (referee) ; Sedlák, Petr (advisor)
This diploma thesis deals with the evaluation of a security solution that was recently deployed by a British company renting office space. This validation system is based on a database of MAC addresses, a database of clients and active filtering of connected devices. The first part explains the concepts of computer network, VLAN and basic concepts needed to understand the function of dynamic assignment of VLAN and IP addresses. The second part is devoted to measurements based on hypotheses, according to which measures are proposed in the last part to solve these security problems.
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Enterprise Network Design and Simulation - Cisco Virtual Lab
Ollé, Karol ; Komosný, Dan (referee) ; Soumar, Michal (advisor)
Tématem této diplomové práce (dále jen DP) je návrh rozsáhlých podnikových sítí podle doporučení stanovených společností Cisco. Dále je realizována simulace navržené topologie prostřednictvím programů s otevřeným zdrojovým kódem a dohled nad sítí prostřednictvím programu Nagios. Úvodní část obsahuje stručné seznámení se základním rozdělením sítě do jednotlivých funkčních bloků. Druhá část se zabývá popisem jednotlivých funkčních bloků a jejich rolí v rámci celé síťové topologie. Bloky jsou dále rozděleny na jednotlivá zařízení a jsou popsány služby, které tato zařízení musí poskytovat. Třetí část DP se snaží zmapovat základní požadavky na služby, které jsou kladeny na dnešní síťové infrastruktury. Hlavní důraz je kladen na dostupnost všech nabízených služeb sítě. Jsou vyjmenovány jednotlivé protokoly druhé až třetí vrstvy OSI modelu, které zabezpečují stálou dostupnost sítě v případě selhání aktivních prvků. Čtvrtá část DP se věnuje popisu návrhu síťové topologie WAN. Pátá část obsahuje popis bezpečnostních rizik, která ohrožují dostupnost sítě, tak i popis útoků, které mají za cíl krádež identity uživatele. V šesté části DP jsou popsány programové nástroje pro zprávu sítí (Nagios, Cisco Security Device Manager) a programy, které simulují Cisco přepínače, směrovače (Dynamips & Dynagen, GNS3) a Cisco PIX firewall (PEMU). Sedmá kapitola se zabývá konkrétním návrhem rozsáhlé sítě s použitím principů, které byly zmíněny v předcházejících kapitolách. Navržená infrastruktura je dále realizována pomocí simulačních programů a tato virtuální síť dovoluje demonstrovat nastavení a chování všech popsaných protokolů a zařízení. V závěrečném shrnutí je nejdůležitější poznatek, že návrh a konfigurace rozsáhlé sítě a její realizace ve virtuálním prostředí je funkční a použitelná pro pokusné účely i pro studijní účely.
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Devices Monitoring in Computer Networks
Kutaj, Matej ; Musil, Petr (referee) ; Škorpil, Vladislav (advisor)
This bachelor thesis deals with the supervision of computer networks and related technologies. The bachelor thesis describes individual technologies, topology of supervised network, list of Vlan networks, description of Zabbix system, its implementation in Hyper-V and setting of individual network adapters, description of error solving by creating script and then creating all elements using web interface. The results are created by maps of individual monitored networks and created graphs from priority switches.
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Model of the metropolitan optical network
Prudík, Jiří ; Hudcová, Lucie (referee) ; Křivák, Petr (advisor)
The purpose of this master’s thesis is foremost to provide a simple guide how to build elements of optical metropolitan area network. The basic model consists to sequence of construction, network topology, passive and active parts. The collection contains examples of alternative technology such as Wireless LAN with different frequency. The optical network construction based on optical cable, fibres, splices, trays, adapters, connectors and active parts for example a lot of media convertor models. After that there are demonstrating type of wavelength division multiplexer used in metropolitan area network – passive planar PCL splitter. One of the passive planar splitter are used to increase optical fibre channel. At the end of the collection a simplified examples of used measurements – optical time domain reflectometry and optical fibre transmission. Contains standard protocols or reflectogram. The conclusion of this thesis summarizes costs of FTTb (Fibre To The Building) model of optical metropolitan area network in Czech republic and future contribution for society.
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Revision & improvement of structural cabling in the building of the Faculty of Music, Janáček Academy of Music and Performing Arts
Špičák, Jan ; Novotný, Vít (referee) ; Sedlák, Petr (advisor)
The objective of this bachelor’s thesis is to perform an analysis of structural cabling in the building of the Faculty of Music, Janáček Academy of Music and Performing Arts, and to propose an improvement of mentioned cabling system to achieve current industry standards of stability & reliability. Both horizontal cabling routes and physical network topology are taken into account; network hardware recommendation with its setting is also included, although mentioned newly purchased equipment is not strictly required. In the conclusion, the thesis deals with an economic evaluation of the proposed solution as a major decision-making factor for the chosen public institution.
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Penetration testing of ANC
Dušek, Jakub ; Jakub,, Přibyl (referee) ; Sedlák, Petr (advisor)
This diploma thesis deals with the evaluation of a security solution that was recently deployed by a British company renting office space. This validation system is based on a database of MAC addresses, a database of clients and active filtering of connected devices. The first part explains the concepts of computer network, VLAN and basic concepts needed to understand the function of dynamic assignment of VLAN and IP addresses. The second part is devoted to measurements based on hypotheses, according to which measures are proposed in the last part to solve these security problems.
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