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DPDK Accelerated Firewall
Holubář, Jiří ; Fukač, Tomáš (referee) ; Vrána, Roman (advisor)
Nowadays, when almost everyone uses the Internet, network traffic security must also be ensured. This is what firewall helps with. Some routes require higher bandwidth than others. This thesis explores possibilities of using the DPDK library when implementing the firewall in order to achieve the highest possible bandwidth.
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Laboratory exercises in NS3 enviroment for Advanced communication technology course
Vadkerti, Gabriel ; Mašek, Pavel (referee) ; Langhammer, Lukáš (advisor)
This master thesis deals with creating laboratory exercises for students in simulator NS-3, where the IPv4 and IPv6 protocols, unicast and multicast transmission types, quality of services in wireless networks, furthermore protocols TCP and UDP are analyzed. The first section describes the NS-3 network simulator, the Eclipse development environment and the method how to connect them. In the next section protocols IPv4 and IPv6 are presented, the structure of the headers and the technique of fragmentation are described in detail. Based on this a laboratory exercise is created which deals with comparison of protocols IPv4 and IPv6. In the next section the types of transmissions are described, furthermore the multicast transmission type is explained more in detail. In the next practical section the second laboratory exercise is created, which deals with comparison of unicast and multicast transmission types. The subject of the following section is ensuring quality of services in data networks, the EDCA access method is discussed more in detail. In the next section the EDCA access method is implemented in a simulation as a laboratory exercise, in which the impact of the access category of EDCA to different transmission parameters is investigated. The next section deals with protocols TCP and UDP, furthermore with the structure of their headers. In the last section a laboratory exercise is created, in which the properties of the protocols TCP and UDP are compared.
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Security analysis of network protocols
Bednařík, Jan ; Sobotka, Jiří (referee) ; Hajný, Jan (advisor)
The aim of my bachalor’s thesis is security of net protocols analysis. Because of the huge number of net protocols, I’ve decided to choose only a few of them to describe. My task is to describe the TCP/IP model structure in term of security, so I have chosen to devide my thesis into two separate parts. The first part contains describtions of particular TCP/IP layers and adumbration of possibilities of securing. The second part contains more accurate describtions of some chosen protocols, mostly the case of their security. At the close of my work it is my task to describe some utilities and methods which can be used to accomplish an successful attack on chosen net protocols. I have chosen protocols HTTP, FTP and SSL. As the utilities I have chosen programs Wireshark, Brutus and SSLSTRIP.
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Control and monitoring unit for optical link station
Ovčáček, Martin ; Kolka, Zdeněk (referee) ; Prokeš, Aleš (advisor)
The aim of Master's thesis "Control and monitoring unit for optical link station" is design of hardware and software of unit, which provides remote control and data transfer through Internet. It is required monitoring and setting analog parameters of optical link station by web service. It includes description of Ethernet and net protocols. The core of unit are microcontroller C8051F120 and ethernet controller CP2200 made by Silicon Laboratories.
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ECG Signal Transmission via Ethernet
Bayerová, Zuzana ; Provazník, Ivo (referee) ; Sekora, Jiří (advisor)
The semestral thesis describes ECG signal compression methods designed to modify the data for transmission via communication channels. The thesis contains an introduction to Ethernet and explanation of communication in the network. The transport protocols TCP and UDP are discussed in more detail. In the practical part of the thesis was created two separate applications. The first application in the sender's computer opens a text file with the ECG signal. Loaded ECG signal is filtered by cascade of filters to eliminate interference. The resulting signal is displayed. A part of the application is the R wave detection, calculating the length of RR interval and heart rate. The application also allows to compress an ECG signal. ECG signal is sent via Ethernet network via UDP protocol for individual samples. Applications in the recipient's computer receives signal samples from the network. Recieved compressed data is reconstructed. The resulting ECG signal is displayed and there are again detected R waves, the length of RR intervals and sampling frequency are calculated.
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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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