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Estimate of data strem delay during transit through network device
Dopita, Michal ; Komosný, Dan (referee) ; Verner, Lukáš (advisor)
This thesis is focused on the issue Estimation of delay during the data flow going through network device. There is analyze of network parameters, which influent final delay, detection of delay in data networks and types of delay in the network. The practil part is focused on development of the software, which performs the estimation of delay. At the end there is a summary of the whole thesis and evaluation of measurements.
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An accurate comparison of the methods for passive IP Geolocation
Mrázová, Andrea ; Komosný, Dan (referee) ; Verner, Lukáš (advisor)
This thesis aims to evaluate the physical location of the stations connected to the Internet, focusing on passive methods of IP geolocation, specifically by using geolocation databases. The first part is generally described what it is IP geolocation, the second section describes the active and passive methods of IP geolocation and the third section describes the practical parts of assignment and the results that we found.
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Automatic configuration of intermediate networking devices used in Cisco academy
Verner, Lukáš ; Jeřábek, Jan (referee) ; Komosný, Dan (advisor)
his semestral´s thesis deals with proposal and system implementation for automatic configuration of Cisco network devices. This system is called AutoConf and it is intended for distant copying configuration files from eagle-server to the switches and routers in Cisco academy laboratory. It is handled by web pages placed on eagle-server. In this system, user can create new laboratory exercises with configuration files for network devices and then these files could be used for configurations. Informations about done configurations are saved in relation database MySQL. Network devices which will be configured by system AutoConf have to be connected with eagle-server. To setup their connection settings was created decision-making mechanism. If it detects physical connection between network device and eagle-server before network device starts, it will set network device for communication with eagle-server.
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Multicast in IP networks
Petrovský, Peter ; Verner, Lukáš (referee) ; Krkoš, Radko (advisor)
This semestral thesis deals with multicast communication. It explains the principle of multicast data transfer. It also deals with protocol for logging into groups and distributed multicast services. Using TFTP is implemented system for content distribution by multicast communication. It measure and compare the difference between unicast and multicast.
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Automatic configuration of networking devices in Cisco academy laboratory
Verner, Lukáš ; Pust, Radim (referee) ; Komosný, Dan (advisor)
This bachelor´s thesis deals with proposal and system implementation for automatic configuration of Cisco network devices. This system is called AutoConf and it is intended for distant copying configuration files from eagle-server to the switches and routers in Cisco academy laboratory. It is handled by web pages placed on eagle-server. In this system, user can create new laboratory exercises with configuration files for network devices and then these files could be used for configurations. Informations about done configurations are saved in relation database MySQL. Network devices which will be configured by system AutoConf have to be connected with eagle-server. To setup their connection settings was created decision-making mechanism. If it detects physical connection between network device and eagle-server before network device starts, it will set network device for communication with eagle-server.
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Network infrastructure performance analysis
Barniak, Martin ; Verner, Lukáš (referee) ; Krkoš, Radko (advisor)
This thesis deals with analysis of network infrasctructure. It focuses on devices like a switch and router. To analyse a network we usually use resources which are divided into basic and advanced. Basic resources are the most commom like a ping, trace route, netstat, route or arp. The term advanced means network analyzers. Network analyzer is Optixia XM2. Next are described individual key parameters which are dependent on function and reliability of computer network. Thesis describe measurement methods like RFC 2544, RFC 3393 and EtherSAM. The conclusion is devoted to individual measurements and their evaluation.
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Use of optical cable properties for geolocation in the Internet
Chmelař, Jakub ; Verner, Lukáš (referee) ; Komosný, Dan (advisor)
This thesis deals with the IP geolocation which estimates the geographic location of hosts in the Internet network. The knowledge of geographic location can be used both for targeting specific services and information, such as advertisement or weather forecast, and for better utilization of transport network because it is possible to serve content from sources which are located closer to client. The main topic of this thesis is the Speed of Internet geolocation method (SOI), which is an active method based on measurement of latency in network. The theoretical part of the thesis explains how to perform these measurements and briefly describes a few more active geolocation methods. The practical part includes full description of SOI implementation created using Python programming language. This implementation was subsequently used to accomplish a sequence of measurements which allowed accuracy comparison with other geolocation methods. The final part of this thesis evaluates results of these measurements and offers a few possible changes which could improve accuracy of described implementation.
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Geolocation of Internet nodes using domain name analysis
Jelínek, Ondřej ; Verner, Lukáš (referee) ; Komosný, Dan (advisor)
Goal of this thesis is to create an application for geolocation of hosts using an analysis of domain names. The theoretical part of the thesis focuses on estimation of geographic location of hosts in the Internet (called geolocation) and the DNS system. This knowledge is necessary for creation of the application. The first task is to choose suitable method of geolocation. The next step is to fully undestand the DNS system and function of domain names. Finally, the application for analysis of domains in JavaFX Script programming language is created. The practical part of the thesis describes this application, its structure, function and results. Acquired data are analysed and compared to results of other geolocating methods.
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Visualization of PlanetLab nodes location
Polášek, Jakub ; Verner, Lukáš (referee) ; Komosný, Dan (advisor)
This paper deals with a way to display the location of PlanetLab network stations on map. Here I theoretically go through PlanetLab network, theoretical terms from this field and way of functioning. To create the script performing this function is used scripting language JavaScript. In the practical part is shown principle of creating a database nodes, which is then necessary for the script that rendering markers on the map and obtain further information. At the end is described the script written in JavaScript, which is attached to this work as a vizualize.html.
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Localization of geographic position attacker in the Internet
Kubalík, František ; Komosný, Dan (referee) ; Verner, Lukáš (advisor)
This thesis deals with the evaluation of the geographical location of the Internet using delay and implementating method Octant. The first part is devoted to familiarization with the principles of evaluation of the physical position of the stations on the Internet, with a focus on active methods for IP Geolocation. Here it is more space devoted to geolocation Octant algorithm and a more detailed explanation of its principles. At the end of the first part is also familiar with the experimental network PlanetLab. The second part describes the design and implementation of the program in programming language C#, which locates the searched local station with mentioned localization algorithm Octant. Description realization is accompanied by explained examples of the classes with a detailed explanation. Here are also the results of the methods on selected IP addresses of stations with known locations to detect errors or deviations of method from the actual position of searched station. At the end of this section is a comparison with other active as well as passive geolocation methods.
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