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Host distance measurement using ICMP protocol in IP networks
Fojtová, Lucie ; Komosný, Dan (referee) ; Burget, Radim (advisor)
Current internet more and more often faces the problem of the right definition of distance between the single hosts. The knowledge of this quantity influences the areas of the optimal lay-out of overlay multicast networks, the right selection of peer-to-peer network participant, or the simple decision of the end user: which one of the nearest mirrors to use for downloading datas. The nearest one doesn't have to mean the nearest in geographical point of view - the distance on Internet is usually expressed by quantities as latency or bandwidth. All these examples have got the saving of bandwidth in common and therefore economical saving. The methods of host position prediction in networks work on the basis of measuring latency parameter. The tools for measuring of this parameter will be set up in this thesis and at the same time it will be shown how geographical distance and latency correspond with each other.
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Nástroj na měření odezvy síťových zařízení ovládaný protokolem NETCONF
Rutarová, Barbora
This bachelor's thesis focuses on the development of an application for the automated measuring of responses from network devices. The application will be controlled by the NETCONF protocol. The application was designed to provide accurate information about the status of network devices. The use of RAW sockets allows the application to process parallel ICMP messages and detect errors in ICMP packets. Based on the obtained data, statistics are created that allow the user to monitor key parameters such as delay, loss rate, or jitter. To achieve this goal, a custom YANG module was designed and implemented, which serves to save the configuration and manage the measured data. This work presents a detailed design and implementation of this solution, including an analysis of its performance and a comparison with existing tools for monitoring network devices.
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Host distance measurement using ICMP protocol in IP networks
Fojtová, Lucie ; Komosný, Dan (referee) ; Burget, Radim (advisor)
Current internet more and more often faces the problem of the right definition of distance between the single hosts. The knowledge of this quantity influences the areas of the optimal lay-out of overlay multicast networks, the right selection of peer-to-peer network participant, or the simple decision of the end user: which one of the nearest mirrors to use for downloading datas. The nearest one doesn't have to mean the nearest in geographical point of view - the distance on Internet is usually expressed by quantities as latency or bandwidth. All these examples have got the saving of bandwidth in common and therefore economical saving. The methods of host position prediction in networks work on the basis of measuring latency parameter. The tools for measuring of this parameter will be set up in this thesis and at the same time it will be shown how geographical distance and latency correspond with each other.
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