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UDP a TCP Communication for FITkit
Musil, Martin ; Strnadel, Josef (referee) ; Vašíček, Zdeněk (advisor)
The aim of this thesis was to extend educational platform FITkit for the possibility of communication via TCP and UDP protocol. Communication is provided by Ethernet module ENC28J60 from Microchip. Communication protocols are provided by library enc28j60, which is implemented in C language. The theoretical part deals with analysis of network protocols to be implemented. Work continues describing the characteristics and parameters of the connected module. Followed by a design library in which is particular emphasis on limited computing resource of the platform. In the implementation of the work is to describe the application interface and the basic principles of the library.
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Network Interface for Keyword Spotting System
Skotnica, Martin ; Glembek, Ondřej (referee) ; Szőke, Igor (advisor)
A considerable part of the research in computer science is dedicated to speech recognition as the speech-controlled systems become useful in many applications. One of them is the keyword spotting which makes possible to find words in audio data. Such a detector is developed at BUT Faculty of Information Technology. The goal of this work is to propose a network interface to this keyword detector based on client/server architecture. Client connects to the server and sends audio data. Server runs keyword detector with this received data and sends the result of keyword spotting back to client. Finally client visualizes the result and interact with user.
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Methods for measurement of data network performance and quality parameters
Sukup, Luboš ; Zeman, Václav (referee) ; Novotný, Vít (advisor)
Master thesis involves the development of quality measurement issues and performance parameters in data networks. It describes the main technologies as they affect the quality and performance parameters and the effect of these parameters for voice, video and data services. Next are listed some methods for measuring parameters of the data network.In the practical part is selected one method of measuring network parameters and properties of this method are demonstrated by illustrative examples.
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Laboratory exercises in Riverbed Modeler simulation environment
Lojek, Stanislav ; Bečková, Zuzana (referee) ; Langhammer, Lukáš (advisor)
This semestral thesis deals with the creation of a laboratory exercise for the course of Communication Technology. This course is designed for Teleinformatics in bachelor's degree program and should provide students with basic knowledge of network protocols and technologies. For this reason, the thesis deals with basic transport protocols, protocols for transmission via backbone networks and network layer protocols. The introductory part introduces the OPNET design environment, more precisely its free version of Riverbed Modeler Academic Edition 17.5, where the design of the laboratory exercises is done. The second part is a necessary theory to the exercises. The lab exercise is focused on differences in TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) protocols. The second laboratory exercises is focused on technologies for transmission mainly on WAN (Wide Area Network) namely ATM (Asynchronous Transfer Mode) and Frame Relay. The last proposed exercises deals with the two most prominent Internet protocols that are used for communications IPv4 (Internet Protocol version 4) and IPv6 (Internet Protocol version 6) protocols. Guides for students have been created for this task, and at the end of each part, the complementary tasks and questions are given to students in oder to test the gained knowledge of the discussed issues.
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Communication devices over GSM/GPRS
Prečan, David ; Růčka, Lukáš (referee) ; Herman, Ivo (advisor)
This master thesis deals with a data remote transmission by means of SMS and GPRS technology. The overview of current solutions is presented and then a remote temperature measurement and a data transmission employing a communication module GSM/GPRS TM1 through GSM network using GPRS technology is described. As a response to an impulse, the communication module sends SMS. The technical solution is described in details including HW and SW design of the data transfer and processing equipment using a ATmega 162 microprocessor. This equipment communicates with a server (PC), which displays the measured temperature. A prototype which was used for a validation of the design is also described.
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Computer Identity Based on Its Internal Clock Skew
Franková, Barbora ; Matoušek, Petr (referee) ; Polčák, Libor (advisor)
Thesis deals with remote computer identification based on its internal clock skew. It describes various methods to collect and evaluate time-related data extracted from TCP, ICMP and Javascript. Software package that implements some of those methods is attached as well. During the work, many experiments were carried out to find out possible effects of certain factors. Tests were aimed on software (operation systems, web browsers and time synchronization) as well as hardware (temperature, power source, distance and network connection type) of the remote systems. Interesting results were discovered in areas of IPv4/IPv6 address pairing and NTP time synchronization.
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The obstacle detection
Hradiský, Marek ; Čožík, Ondřej (referee) ; Šteffan, Pavel (advisor)
Diploma thesis deals with design and the processing of video captured by Raspberry PI and the possibility of object detection in video. In this thesis is described Raspberry PI as well as video capturing by PiCamera module. There is also section about video processing by OpenCV.
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Performance Measurement Tool for DNS Servers
Postolka, Matěj ; Kučera, Jan (referee) ; Vrána, Roman (advisor)
Tato práce popisuje návrh a tvorbu testovacího prostředí pro měření výkonnosti DNS serverů nad transportními protokoly TCP a UDP. Obsahuje výsledky výkonnostního měření tří různých implementací autoritativních DNS serverů nad síťovým provozem složeným z různých typů DNS dotazů zaslaných pomocí různých síťových a transportních protokolů. Je provedeno srovnání výkonnosti těchto implementací.
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Network applications in .NET Framework
Koch, Michal ; Morský, Ondřej (referee) ; Lattenberg, Ivo (advisor)
The thesis deals with the programming of network applications using .NET Framework. C# is a programming language. The thesis consists of four parts. The first part is devoted to web services, their characteristics, practical publications and web service client which is the the most common case of use of this service. The second part deals with client-client communication. As an example a simple messages sending is shown here on which are explained the principles how to create this type of application and what classes are available. The third part deals with the communication clientserver. An server application is created to connect multiple clients and send their requirements and server response them. The last part is devoted to encrypted communication. The model client-client is extended to asymmetric encryption. The thesis contains also tutorial videos which show a simple ASP.NET application development and its connection to the web service or ASP.NET application that supports HTTPS protocol and the necessary IIS configuration.
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Stress tester
Charvát, Ondřej ; Martinásek, Zdeněk (referee) ; Zeman, Václav (advisor)
The diploma thesis deals with network infrastructure load testing. It’s target is to design and implement a network probe which will be in a form of JMeter plugin one of the components in load tester project. It offers sufficient theoretical basis about load testing, analyzes different types of DoS which can be used to stress the tested infrastructure and also discusses some solutions for load testing realization used in practice. Following is a study of possible ways for realization of the probe with help of several open-source tools. The suitability of individual tools is evaluated from the point of view of the network probe requirements and then the most suitable ones are selected as the basis for it’s implementation. Then, a network probe design is constructed in which it’s functionality is divided into two separated plug-ins, a network probe itself and a server emulator, and the implementation phase is commenced. The implementation is done in Java programming language to allow the new components to use all the neccessary JMeter API functions. The structure of individual parts of the modules as well as many implementation details are analyzed thoroughly in the text. The final chapter of the thesis describes function of the newly created components. After their installation into the load tester the procedure and the results of the functional testing are presented. This thesis describes the whole process of developing a plug-in for JMeter software.
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