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Simulation scenarios for analysis of behavior of transport networks
Koláčková, Aneta ; Koton, Jaroslav (referee) ; Jeřábek, Jan (advisor)
This master’s thesis deals with the issue of mobile networks, protocol suite TCP/IP and routing protocols. It focuses in particular on the functioning of the transport part of the third and fourth generation mobile networks and intends to fnd the most suitable options for their emulation. The master’s thesis compares two selected emulation programs through a series of tests that were performed on a server created for these purposes. The main outputs are two detailed comprehensive scenarios and solutions have been developed. The frst scenario deals with the overall transport network confguration. The second scenario is based on the frst one and is focused on troubleshooting of particular issues in this network. Their implementation helps to analyze the behavior of the transport part of the mobile 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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Development of evaluation model of MANET in NS-3 environment
Gilík, Aleš ; Vajsar, Pavel (referee) ; Hošek, Jiří (advisor)
This bachelor thesis is focused on Manet networks and creation of web application for generate configuration file which is simplifying simulation of Manet networks. The theoretical part concerns with description of Manet networks, distribution of routing protocols and closer look on five of the protocols. In the next part is described simulator Ns-3 with his content for simulations. The practical part is describing creation of configuration file and his elements. For that was created web application in PHP language. All used technologies for creation of the application are described in this thesis. The web application is fully processed and operational.
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Measurement of Backbone Routing Parameters
Celárek, Ondřej ; Kořenek, Jan (referee) ; Matoušek, Jiří (advisor)
This thesis deals with issue of routing between Autonomous Systems. For routing between autonomous systems is used Border Gateway Protocol (BGP). The routers in Autonomous Systems modify their routing tables based on BGP messages. Routing tables are used for forwarding information on Internet. Issue of this thesis is analysis of change routing tables for eventually optimizing of routing architecture. First part of thesis is focused on theory of routers, routing ang BGP. Second part of this thesis focuses on implementation and execution experiments with routing tables. In this part are also described reached results.
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Simulators for Wireless Sensor Networks
Capalini, Richard ; Nagy, Jan (referee) ; Zbořil, František (advisor)
Wireless sensor networks (WSN) were designed for purpose of monitoring physical phenomenons and controlling processes by sensors placed in nodes. There are three basic principles: detection of event (phenomenon), data capture and data processing in node. Afterwards data are transmitted to interested node. WSN typically consists of huge number of thousands nodes and one base station. Nodes cooperatively disseminate data towards a base station, which saved them to memory and provide access to users for example over Internet. This work report a comprehensive view of wireless sensor networks and routing tasks in sensor field. Practical part of work is aimed at simulation of choosen routing protocols placed in suitable models.
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Application for automatic control of CISCO device configuration
Zbořil, Tomáš ; Jeřábek, Jan (referee) ; Kubánková, Anna (advisor)
The problem of mismatched running configurations on the networking devices is common and it is not always easy to troubleshoot. Another problem of the same scale is an analysis of the routing information in routers, its heterogeneity in terms of dynamic routing protocols, numerous various settings, and last but not least, management of these protocols. These problems require a software solution that would be helpful in analysis and would allow for automated addressing of problems found during the analysis. This master's thesis attempts to do this by designing and implementing such program for the protocol OSPFv2. It uses the SSH protocol to allow for retrieval of running configuration files from the devices and their comparison to the user-added configuration files. SSH protocol is also used to run commands on the devices and to gather their outputs, which are subsequently analysed. The output of the analysis is used in automated error correction, the correctness of which, is checked by the presence of the routes on the routers to the rest of the network.
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Modelling Cisco Router in Simulation Tool OMNeT++
Sivák, Vladimír ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
This bachelor's thesis describes simulation of computer networks using open source simulator OMNeT++ including the INET Framework extension. According to real behaviour of Cisco routers, we implemented a new modul for the INET Framework extension. Casy study compares behaviour of real network with simulation of the same network in OMNeT++ using the implemented modul.
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Analysis of vehicular ad hoc network
Varmus, Pavol ; Mašek, Pavel (referee) ; Kubánková, Anna (advisor)
This diploma thesis aims to study VANET (vehicular ad hoc network), to describe the theory of this networks and describe attributes of these networks and to set the starting point for practical part. Thesis includes VANETs possibilities, its signal transportation and description of routing protocols. Another goal was to familiarize program NS-3 and set up simulation models in its interface. The main output of the practical part is program which simulates vehicle movement in Brno city and set the communication module which is adapted to fulfill the most realistic transmission capabilities. Practical part is divided to two parts. The goal of the first one was to simulate basic communication in theorized unrealistic scenario and the second part was the more realistic scenario. Overall, throughout the practical part was tested a variety of attributes, such as mobility models, standards, routing protocols and other parameters that provided diversity in final results. All the results, which consisted of summary of basic transmission capabilities and reclassification of the applicability of those technologies in real world, are discussed in the summary of the simulations output.
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OSPFv3 dynamic routing protocol for MANET networks in OPNET Modeler simulation environment
Henzely, Július ; Skořepa, Michal (referee) ; Růčka, Lukáš (advisor)
This bachelor's thesis includes theoretical knowledge about fundamental informations related to functionality of mobile networks, with focus on MANET routing protocols. The project contains an overview of routing protocols, especially OSPFv3 routing protocol. In the practical section of project, there is a brief description of OPNET Modeler simulation environment and the process of establishing the network with configured routing protocol in it. The project also describes a procedure for extending of the Hello packet structure by a field containing node traffic speed in OPNET Modeler.
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Usage of NS2 simulator in multicast networks
Hošek, Petr ; Mlýnek, Petr (referee) ; Koutný, Martin (advisor)
The thesis is focused on routing in data network, especially on network method of multicast. The first section closely deals with particular multicast protocols and next with models of multicast, mainly Any Source Multicast and Source Specific Multicast. The main point of this work is implementation of multicast using Network Simulator. On the practical level, two laboratory exercises are included. In this part, readers have the possibility to make sure of reached knowledge of multicast and its implementation in NS2.
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