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Geolocation of nodes in Internet using public databases
Sousedík, Tomáš ; Verner, Lukáš (referee) ; Komosný, Dan (advisor)
This thesis is about host localization using public localization databases in the Internet and related problems. There is basic information how geolocation in general works extended with some other geolocating methods with focus on the geolocation databases. Where it was possible it was written how databases were created and kept up to date. In practical part is described the process how locating functions were made and what problems appeared. At the end is evaluated the accuracy of the databases and comparison between databases and other methods.
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Internet nodes localization using synthetic coordinate systems
Švéda, Jaroslav ; Jelínek, Mojmír (referee) ; Komosný, Dan (advisor)
This thesis deals with predicting the latency between two network nodes, such as the two stations, two servers or server and station. The main reason for adoption of effective latency prediction techniques is the elimination of network load caused by unnecessary repeated transmissios or by direct measurement of the latency. Of the many proposed methods of latency estimation, this thesis is focused on methods using artificial coordinate systems with primary focus on the Vivaldi algorithm. Characteristics of the latency prediction methods and properties of various coordinate systems used in practice are evaluated. The issue of the number of dimensions of space defined only by the latency matrix between nodes is also mentioned. Furthermore, some other systems, based on logical clustering of nearby nodes, are mentioned. Description of simulation software VivaldiMonitor developed as part of the thesis is included. The primary purpose is analysis of the behavior of overlay networks implementing Vivaldi algorithm with less than a few hundred nodes. The Vivaldi algorithm is assessed by several simulations carried out using the aforementioned software.
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Geolocation of nodes in Internet using public databases
Sousedík, Tomáš ; Verner, Lukáš (referee) ; Komosný, Dan (advisor)
This thesis is about host localization using public localization databases in the Internet and related problems. There is basic information how geolocation in general works extended with some other geolocating methods with focus on the geolocation databases. Where it was possible it was written how databases were created and kept up to date. In practical part is described the process how locating functions were made and what problems appeared. At the end is evaluated the accuracy of the databases and comparison between databases and other methods.
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Internet nodes localization using synthetic coordinate systems
Švéda, Jaroslav ; Jelínek, Mojmír (referee) ; Komosný, Dan (advisor)
This thesis deals with predicting the latency between two network nodes, such as the two stations, two servers or server and station. The main reason for adoption of effective latency prediction techniques is the elimination of network load caused by unnecessary repeated transmissios or by direct measurement of the latency. Of the many proposed methods of latency estimation, this thesis is focused on methods using artificial coordinate systems with primary focus on the Vivaldi algorithm. Characteristics of the latency prediction methods and properties of various coordinate systems used in practice are evaluated. The issue of the number of dimensions of space defined only by the latency matrix between nodes is also mentioned. Furthermore, some other systems, based on logical clustering of nearby nodes, are mentioned. Description of simulation software VivaldiMonitor developed as part of the thesis is included. The primary purpose is analysis of the behavior of overlay networks implementing Vivaldi algorithm with less than a few hundred nodes. The Vivaldi algorithm is assessed by several simulations carried out using the aforementioned software.
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