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An Architecture for Global Distributed SIP Network Using IPv4 Anycast
Anděl, Ladislav ; Polívka, Michal (referee) ; Kovář, Petr (advisor)
Tato diplomová práce se zabývá metodami pro výběr nejbližší RTP proxy k VoIP klientům s použitím IP anycastu. RTP proxy servery jsou umístěny v síti Internetu a přeposílají RTP data pro VoIP klienty za síťovými překladači adres(NAT). Bez zeměpisně rozmístěných RTP proxy serverů a metod pro nalezení nejbližšího RTP proxy serveru by došlo ke zbytečnému poklesu kvality přenosu médialních dat a velkému zpoždení. Tento dokument navrhuje 4 metody a jejich porovnání s podrobnějšími rozbory metod s využitím DNS resolvování a přímo SIP protokolu. Tento dokument také obsahuje měření chování IP anycastu v porovnání mezi metrikami směrování a metrikami časovými. Nakonec dokumentu je také uvedena implemetace na SIP Express Router platformě.
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Automated system for installing and configuring GNU/Linux virtual hosts
Horák, Daniel ; Polívka, Michal (referee) ; Pelka, Tomáš (advisor)
This work deals with possibilities of administration of virtual machines (mainly from the developer's point of view) and available methods for automatic installation of GNU/Linux distributions. First part contains the information about virtualisation technologies and possibilities to configure them with a libvirt library. The definition and specification of each part of virtualisation environment (virtual machines, disks, networks) using XML is described. Further more the possibilities of automatic installation of Linux distributions based on RedHat and Debian considering the virtualisation environment are discussed. The possibility of copying an existing disk with installed system is also mentioned. In a practical part a server application for control and management of virtual machines including automatic installation of operating system is proposed and realised.
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SIP client in Java
Zukal, Martin ; Polívka, Michal (referee) ; Číka, Petr (advisor)
This bachelor’s thesis deals with a design of a client-based application with the utilization of the Session Initiation Protocol (SIP). The first part describes SIP with an emphasis on basic concepts. Then a brief description of the Java programming language which will be used for the implementation follows. The most extensive part is devoted to the description of a design and implementation of the application. Some techniques used during the development of the applicaton are being discussed in this part. The thesis is finished up with test scenarios verifying functionality of the application.
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Web interface for submitting student projects
Hill, Tomáš ; Polívka, Michal (referee) ; Pelka, Tomáš (advisor)
This master thesis deals with the description of web framework Web2py. The web frameworks are designed to facilitate the development of web applications. Selected web framework, Web2py, is written in Python programming language. The main purpose of this thesis is to create web application able to manage student projects and also manage students attendance. Created application is optimised for special needs of laboratory PA126.
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Perfecting the analysis of 10Gbit/s computer network
Ťápal, Tomáš ; Polívka, Michal (referee) ; Škorpil, Vladislav (advisor)
The master’s thesis consists of several parts. Describes the technology 10 Gbps Ethernet. Analyzer Ixia and Endace presents, especially their use for traffic analysis and stress testing the network devices. It deals with documents RFC concerning the routers and switch testing. Thesis includes the reports of tests switches and router performed by RFC 2544 and RFC 2889 documents. Part of the thesis is dedicated to COMBO FPGA cards. Documentations to the analyzers is created in this thesis and macro is on the CD for presentation of measurement results.
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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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Security risks of wireless access networks
Špidla, Milan ; Hošek, Jiří (referee) ; Polívka, Michal (advisor)
Master´s thesis „Security risks of wireless access networks“ deals with wireless access networks, which are the most widespread in this time. The main target is realization of attacks wireless access networks protected by various using methods. This thesis shows main securities gaps, which originate from project this networks. These securities gaps are used for realization attacts in practical part. In the next part I took attention of network´s monitoring possibilities.
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Handset based computer control
Kovář, Jan ; Kouřil, Jiří (referee) ; Polívka, Michal (advisor)
The master's thesis is focused on Java based solution of remote PC control using a mobile phone. Application is made up of client and server, which are communicating via Bluetooth interface. The client represents a mobile application (MIDlet) and commands sent to the server. Server, run on a computer (with any operating system), read these orders and evaluate their algorithms to control the PC. The issue of the draft text is divided into two units, each of them describes just one part of the application. The client describes its functionality. It is also fully examines the structure of mobile application programmed in Java ME, together with the most important methods of this code. Text dealing with the server part describes its activities as well as individual options utilization. It describes the structure of the server application which is programmed in Java SE. There are also a description of the most important methods of the Java SE code. This thesis gives the results of both components of the application that allow to remotely control the computer and especially the presentation. The application was properly debugged and tested, and form a functional multiplatform software.
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File exchange on the internet
Tropp, Peter ; Pelka, Tomáš (referee) ; Polívka, Michal (advisor)
The main aim of my thesis was the TCP/IP protocol issue and the data transfer over the internet using FTP protocol. The thesis is demonstrating the main settings of a server, his functionality and it further describes the development and use of HTML and PHP protocols in my created application. The final chapter of my thesis explaining the resolution of web application interfaces for complex work with and portability in virtual environments.
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Design of laborotory high-speed system usage
Benda, Ondřej ; Polívka, Michal (referee) ; Škorpil, Vladislav (advisor)
This thesis deals with high-speed communication equipment based on Cisco 2821. Includes description of facilities, physical and logical diagrams, instructions for basic orientation in the operating system Cisco IOS, and the procedure for the preparation of the workplace. Further in this document, there are three laboratory task on the topic of MPLS IP, Traffic engineering with MPLS and Circuit emulation over IP. Each task includes introduction, instructions for the elaboration, the question of the task, desired outcome and brief guide for teachers.
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