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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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Experimental network PlanetLab
Grejták, Matej ; Novotný, Vít (referee) ; Komosný, Dan (advisor)
This thesis deals with visualization of PlanetLab network nodes locations defined on a base map. Theoretical part is concerned with basic knowledge of PlanetLab network, its history and general terminology. Furthermore, Google Maps application programming interface is described, which base maps are used in this thesis. Also, other used technologies as JavaScript and Apache web server are covered in the theory, these technologies combined together create the whole structure of dynamic website. Practical part is dedicated to the visualization of nodes represented by map tags. It also explains main sections of a code used on the main page with brief server configuration guide.
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Monitoring of Internet servers
Pospíchal, Ondřej ; Burget, Radim (referee) ; Komosný, Dan (advisor)
This thesis deals with the availability of devices and the availability of remote connection to devices via SSH in the network PlanetLab worldwide. The theoretical part consists of the description of the network PlanetLab, services ping and SSH, program environment, in which was the practical part made, and parallelization of processes, which was used during optimizing the program. The practical part describes the creation, functions and outputs of the application, which continuously tests servers in the network PlanetLab. Analyzing the results of the program it was found that the availability of PlanetLab devices is relatively stable, but unsatisfactory. More than half of the devices of this network do not respond to neither one of mentioned services.
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Localization of nodes in Internet using Vivaldi system with adaptive time step
Mašín, Jan ; Balej, Jiří (referee) ; Komosný, Dan (advisor)
The aim of this thesis was to identification with the principles of logical evaluation of the position of stations on the Internet. Read up on the localization algorithm called Vivaldi with adaptive time step and subsequently to its implementation in the operating system GNU/Linux CentOS distribution. Do one's homework the PlanetLab experimental network (http://www.planet-lab.org/). At selected stations from the network transfer created by the application and verify its function on the real servers located at various places around the globe and assess the accuracy achieved by estimating the distance between stations on the PlanetLab network. In this scope of activity, the application was created to measure the delay prediction using Vivaldi algorithm with adaptive time step which is on principle of operation a client-server where the client performs the steps of the algorithm, Vivaldi and the server only listens, collects the resulting data Vivaldi algorithm and stores them neatly file. Furthermore, the application was developed for direct measurement of the delay, which also functions as a client-server. These applications have been transferred to the selected nodes from the PlanetLab experimental network. Subsequently, these nodes were running, to carry out the necessary measurements. The resulting values were work into tables of using Microsoft Excel. These values were then compared with direct measurements and competitive positioning by the King. Vivaldi localization methods with adaptive time step and the King, were compared based on calculated estimates of both real estate errors and measurement using distribution function of the relative errors of both methods. All this information was evaluated to compare accuracy of both the localization methods and direct measurements.
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Data collection from Twitter
Kmeť, Juraj ; Povoda, Lukáš (referee) ; Komosný, Dan (advisor)
The bachelor thesis deals with creating application for data gathering from social network Twitter. Data is gathered in real time with variable length of gathering. Theoretical part describes social network Twitter as a client but also as a tool for data gathering. The bachelor thesis identifies limits which need to be respected during the creation of Twitter applications. Another topic of the thesis is PlanetLab network, which is well known mainly by the network researchers and developers of network applications. History of PlanetLab is captured within the second chapter and the difference between PlanetLab and other research networks. Practical part contains guide for application development in programming language Python. Process of the application disctribution to the PlanetLab nodes is enclosed as well. Last chapter analyses data collection and maximum speed of data gathering in the created system.
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Current methods for geolocation of Internet hosts
Doležel, Pavel ; Müller, Jakub (referee) ; Balej, Jiří (advisor)
This bachelor work deals with IP geolocation, which means the estimation of geographical location of unknown host in the Internet. The aim of my thesis was to make a delay measurement in PlanetLab Network and then with the use of GeoPing technique estimate the real location of the target. The main part of this work is focused on several different delay-based methods, especially GeoPing which employs „Nearest Neighbor in Delay Space“ algorithm in order to exploit the relationship between network delay and geographic location. Base ground for GeoPing is a database of the machines at known location. This database is composed of 9 probe machines, 260 hosts is used like a landmarks and targets. Estimation of unknown geographical location was done on 60 hosts.
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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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Client/Server Application for Global Network PlanetLab
Sladký, Milan ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
Objective of this bachelor's thesis is to get acquaint with experimental network PlanetLab, its history, development, principle of its behaviour and usage of this network, for example for development of new network architectures. Program part of this bachelor's thesis consists of concept and implementation of suitable client/sever type application, which runs on PlanetLab network.
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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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Virtual servers with Fedora operating system
Gajdušek, Ondřej ; Jeřábek, Jan (referee) ; Komosný, Dan (advisor)
This thesis deals with the PlanetLab Server Manager application whose aim is to simplify application development within the experimental distributed network PlanetLab. Thesis presents the PlanetLab network and describes its infrastructure. Application PlanetLab Server Manager, shortly abbreviated as plbmng, is described, its current state is evaluated and the existing functionality is presented to the reader. Further work focuses mainly on the implementation of the new functionality that is a software distribution and job scheduling to run the software at the specified time. The last part of the work presents an experiment that demonstrates a real-life usage of the newly added functionality. Work results are published at the public repository on the GitLab platform. The application was published at the package index for Python Packages - PyPI.
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