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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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Design of reliable VLAN-based enterprise data nework
Vrablic, Pavol ; Krkoš, Radko (referee) ; Novotný, Vít (advisor)
The main aim of this work is to identify the potential issues within a robust network to provide a highly reliable and fault free service – with a smooth and reliable functionality of critical services. This work contains new methods of branch networking and virtualization that is increasingly used in enterprise networks. It is important to note that computer clustering provides the functionality of critical services that can surpass potential partial failures and network QoS; which overall, achieves a high quality and reliable 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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Network virtualization - software defined networks
Veselý, Marek ; Krkoš, Radko (referee) ; Novotný, Vít (advisor)
The aim of work is a new trend in network architecture, called Software defined networks. Describes function of controller as the main device, which controlling the whole network. Further the communication between switch and controller is here, which controlling protocol OpenFlow. First chapter gently deal with principe of the VLAN networking. Further it is much more oriented with software defined networks, where the main principe is described. Protocol OpenFlow is described in deatail, as his functions are discussed too. There are also advantages and disadvantages and possibility to use this network in university campus.
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Proposal of the secure network model
Kis, Matej ; Rosenberg, Martin (referee) ; Babnič, Patrik (advisor)
The goal of this work was to create a design of a secured network infrastructure with decribing different ways of securing at ISO/OSI layers. Create a list of protocols which can be used to achieve a secured network design. In the theoretical part of this work the attention was placed to analyze possible solutions, which can be appllied in a practical part of the work. The practical part involves a design of a network topology and simulation. The part of the simulation was device configuration and network security testing.
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Design of reliable enterprise networks with service quality support
Kiška, Martin ; Koutný, Martin (referee) ; Novotný, Vít (advisor)
This work deals with creating a reliable corporate network and its variety capabilities against loops and supporting QoS on link and network layer. On the basis of theoretical knowledge is designed an experimental network in the laboratory of Institute of Telecommunications composed of several computers, VoIP pohones, switches and routers. Functinonal network is then tested to failure of individual nodes and the impact on network traffic. In another part of this bachelor thesis this network is tested using different QoS support options.
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Modelling and Reliability Analysis of Campus Network at the BUT
Kraus, Zdeněk ; Ryšavý, Ondřej (referee) ; Veselý, Vladimír (advisor)
This thesis informs about technologies and architecture of computer network at BUT. It describes chosen technologies and some of theirs variants. Further, it contains simulation model design of a network switch device. That is followed by the model implementation with detailed description of model parts. Then, the model is tested on a set of simulation scenarios and it is evaluated in comparison with theoretical basis and real devices. In conclusion, thesis suggests future model development and improvements.
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Networking Subsystem Configuration Interface
Lichtner, Ondrej ; Grégr, Matěj (referee) ; Ryšavý, Ondřej (advisor)
Cílem diplomové práce je návrh síťové konfigurační knihovny s důrazem kladeným na přenositelnost mezi operačními systémy na bázi Linuxu a BSD a rozšiřitelnosti podpory knihovny. V druhé kapitole práce zkoumá dostupné konfigurační rozhraní obou operačních systémů. Detailně pak rozebírá vlastnosti rozhraní Netlink socketů, které je primárním konfiguračním rozhraním pro síťové prvky na Linuxu, a systémové volání ioctl, které má na Linuxu menší schopnosti, ale zato je primárně používané na BSD a jiných UNIX systémech. Jsou též zkoumané rozhraní pro konfiguraci rozdílných firewallů. V třetí kapitole je práce zameřená na konkrétní typy síťových zařízení, specifika jejich konfigurace a jejich návaznost na rozhraní jádra popsané v druhé kapitole. V čtvrté kapitole jsou formulovány požadavky na konfigurační knihovnu: jednoduchá rozšiřitelnost, přenositelnost na různé operační systémy, podpora sledování změn a událostí a rozšiřitelnost o různé typy uživatelských rozhraní. Na základě výzkumu z předcházejících dvou kapitol je přednesen návrh knihovny. Návrh definuje konfigurační rozhraní jako hierarchii abstraktních tříd, oddělených od implementace. To umožnuje mít současně několik implementací stejného konfiguračního rozhraní i v rámci jednoho operačního systému. Jako vstupní rozhraní knihovny je definovaná třída LibNCFG, která má na starosti tyto konfigurační objekty vytvořit namísto uživatele. Tímto je dosažená jednoduchá rozšiřitelnost knihovny o nové rozhraní operačních systémů i o podporu konfigurace nových síťových prvků. Podpora pro nové uživatelské rozhraní se dá implementovat jako nová služba, která zabaluje rozhraní knihovny a poskytuje jiná rozhraní. Pro podporu sledování změn poskytuje třída LibNCFG metody pro registraci zpětných volání pro definované události. Ve čtvrté kapitole práce detailně popisuje rozhraní třídy LibNCFG, modulu Common a tříd NetDevice, EthDevice a BondDevice, které definují konfigurační rozhraní příslušných typů síťových zařízení. Pro tyto třídy jsou implementované konkrétní třídy NetlinkNetDevice, NetlinkEthDevice a sysfsBondDevice a popsané jejich implementační detaily. V páté kapitole je popsaná ukázková aplikace, která byla implementovaná pro účely předvedení jednoduchosti použití konfigurační knihovny. Nakonec jsou v závěru shrnuté výsledky práce a je vedena diskuze o možných vylepšeních a o pokračování projektu.
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Monitoring of Ethernet network
Herman, Vít ; Hošek, Jiří (referee) ; Jeřábek, Jan (advisor)
The bachelor thesis deals witch possibility of monitoring active items of Cisco Company, VLAN networks built between them and utilization of particular lines. All the information about items is stored in MIB database. Designed and then implemented system uses pooling MIB database using SNMP protocol, to obtain required information. For application SNMP protocol, programming language Perl is used. Obtained and processed data are stored in MySQL database. Designed system is not dependent either on any platform or this implementation. All the technologies and tools used described in the thesis. In the thesis there is described and shown, how is possible pooling items including results of pooling.
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