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Experimental network for QoS support testing
Fogl, Miroslav ; Mácha, Tomáš (referee) ; Novotný, Vít (advisor)
The work specifies problems with support of qualitative requirements in IP network services on the network and link layer. There are also described options of qualitative support of individual networking components in the UTKO laboratory (routers, L3 switches). Created experimental network is loaded by various types of service (VoIP, FTP, HTTP, Video). Data services realization is ensured by available terminals (IP phones, IP cameras, IP video-phones, servers, client stations). Metering is targeted on the manipulation with packets in the router. Options which Cisco router offers are verified by packet analysis. Available methods of dropping are compared on the base of metering and evaluated. Optimal handling with output queue after metering in experimental network is LLQ mechanism. It is able to prefer packets according to their priority in the IP header. Further the difference of link overloading by huge dataflow after QoS policy using is simulated. To reach availability of data services in the whole network is necessary to deal with mechanisms for qualitative services support in all the network components in the network.
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Principals, switching functions and routing techniques in computer networks
Dvořák, Pavel ; Pelka, Tomáš (referee) ; Polívka, Michal (advisor)
This bachelor thesis consider main principles and function of active network components. Mainly is intent to component working on the third level of referential model ISO/OSI, router. There are described its main parts and more closely charactered routing protocols. Then is verified the ability of dynamic routing to react to failure in the network and there is measured the reaction time of crossing to secondary route when using different routing protocols. Another part of the thesis is focused on the questions of Quality of Service (QoS) and its support in computer networks. There are explored various ways of the QoS configuration on the routers and the proper of them is chosen and applied to the test network.
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Network Infrastructure Design in the Building of Labour Office in Prostejov
Slunský, Tomáš ; Koutný, Vladimír (referee) ; Ondrák, Viktor (advisor)
The thesis concentrates on the network infrastructure problems , its proposal in the civil service area and analyses in detail the present condition of surroundings in the chosen organisation which requirements and needs for the suggested network infrastructure result from subsequently . On the base of the analysis it considers the posibility of realising the network infrastructure which consists in the choice of the suitable technology and the proposal of the computer network structure , including the implementation the solution in the given organisation and the specification of the financing resources.
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Software design for mapping of the network topology
Janura, Dominik ; Novotný, Bohumil (referee) ; Sobek, Jiří (advisor)
This thesis addresses the issues of network topology mapping, where the network consists of multiple Cisco devices. It includes theoretical knowledge in this field and closely describes possible solutions to this problem. It explains the process of design and implementation of this kind of network mapping software by chosen means. Correct function of the created application is tested on a virtual network.
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Impact of Communication Parameters on Energy Consumption of Zigbee Devices
Popelka, Jan ; Červenka, Vladimír (referee) ; Šimek, Milan (advisor)
This thesis deals with the energy research and design a simple wireless sensor networks. The data modules with ZigBee wireless communication technology. The main feature of wireless sensor networks is the minimal energy devices at low cost and maximum data reliability. Furthermore, the work describes firmware for communicating nodes with the ability to change parameters of data transmission and thus affect the energy consumption node. Calculations of energy consumption, compared with the measured results, the discharge characteristics of the battery packs and lifetime broadcasting node is contained in the final chapters of this work.
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Multigateway routing system based on the Mikrotik router
Straník, Jan ; Novotný, Vít (referee) ; Jelínek, Mojmír (advisor)
This thesis deals with the routing of data traffic to multiple gateways with a network operating system MikroTik RouterOS, which has become widespread in the small firms and home users. It is aimed to describe the problem with using multiple gateways. RouterOS description itself and its core components needed to solve this issue, such as routing, packet marking and quality assuranceservices. It also deals with the description of the particular design and testing. The proposedsolution is verified on the example of a real situation. Finally, the proposed solution is compared to alternative solutions, commonly used in practice.
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Analysis of Audio Codecs Applied in IP telephony
Hlavica, Michal ; Szőcs, Juraj (referee) ; Škorpil, Vladislav (advisor)
Issue of this diploma thesis is focused on analysis of audio codecs used within IP telephony. Attention of teoretical part is given mostly to audio codecs according to ITU-T recommendations, but also to signaling protocols used here. For practical part of analysis is chosen router Cisco 2821 and IP phones Cisco 7975G. Configuration is done over operating system Cisco IOS. Chosen signaling protocol is SCCP. For analysis itself are chosen 2 analysers – L-580FX and Fluke NetTool. These are used in combination with program Wireshark. Analysed parameters are latency, packet lost, bandwidth, jitter and mean opinion score. Measured values are presented in graphs and tables and they are discussed. Next output of the thesis is laboratory excercise, which deals with analysis of audio codecs.
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Management of data networks based on IP protocol
Patala, Petr ; Fojtová, Lucie (referee) ; Novotný, Vít (advisor)
The objective of this master’s thesis is monitoring and management of computer networks via SNMP protocol and its practical application. The main part describes working with SNMPc program in an experimental network through implementation of its parts into the network and configuration of SNMP agents on routers, switch and end station. This thesis includes the results of traffic testing, disconnected links, effects of traffic load on QoS parameters, making longterm statistics, baselines and alarms. The thesis also includes parametres obtained with SNMP protocol from network nodes and end station.
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Acquisition of communication statistical data from network infrastructure devices
Gargulák, Lukáš ; Nagy, Ľuboš (referee) ; Krkoš, Radko (advisor)
The diploma thesis describes theory that is needed for application development for acquisition of communication statistical data from network infrastructure devices. Aplication is called SDSKSI. The project compares protocols suitable for this purpose. Finally SNMP protocol was chosen because it is the most common in network devices. SNMP is described in detail. Each SNMP operation has its own practical demonstration. In the project there is also described MIB database and data types of MIB objects. Application is able to create network topology. Then administrator of network can imagine how the network looks like. For each device that support SNMP protocol are periodically collected and stored statistical data which can be exported to the file. For application development were chosen programming languages according to several criteria. Content of the laboratory exercise is presented. At the end of the project there are some system solutions for collecting statistical data. Diploma thesis contents two attachments. The first is containing the full text of laboratory task. The second is DVD disc. Disc is containing ready to boot aplication SDSKSI.
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Management of data networks based on IP protocol
Patala, Petr ; Fojtová, Lucie (referee) ; Novotný, Vít (advisor)
The objective of this master’s thesis is monitoring and management of computer networks via SNMP protocol and its practical application. The main part describes working with SNMPc program in an experimental network through implementation of its parts into the network and configuration of SNMP agents on routers, switch and end station. This thesis includes the results of traffic testing, disconnected links, effects of traffic load on QoS parameters, making longterm statistics, baselines and alarms. The thesis also includes parametres obtained with SNMP protocol from network nodes and end station.
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