|
|
Laboratory scenarios explaining the basics of communication protocols
Pokorný, Karel ; Burda, Karel (referee) ; Jeřábek, Jan (advisor)
The goal of this thesis was to design two complex scenarios with focus on different kinds of transmission in packet-switched networks. First scenario is about ARQ (Automatic Repeat Request) protocols. It consists of introduction to Stop-and-Wait, Go Back N and Selective Repeat protocols and their comparison. Second scenario compares unicast, multicast, broadcast and anycast transmission methods. Both scenarios use applications which can simulate particular methods or protocols. These applications along with virtual environments are used for demonstration of characteristics of these methods/protocols.
|
|
|
Analysis of Entropy Levels in the Entropy Pool of Random Number Generator
Krempa, Peter ; Hanáček, Petr (referee) ; Barabas, Maroš (advisor)
V informatice je pojem entropie obvykle znám jako nahodný proud dat. Tato práce krátce shrnuje metody generovaní nahodných dat a popisuje generátor náhodnych čísel, jež je obsažen v jádře operačního systému Linux. Dále se práce zabývá určením bitové rychlosti generování nahodných dat tímto generátorem ve virtualizovaném prosředí, které poskytují různé hypervizory. Práce popíše problémy nízkého výkonu generátory nahodných dat ve virtualním prostředí a navrhne postup pro jejich řešení. Poté je nastíňena implementace navržených postupů, které je podrobena testům a její vysledky jsou porovnány s původním systémem. Systém pro distribuci entropie může dále vylepšit množství entropie v sytémovém jádře o několik řádu, pokud je připojen k vykonému generátoru nahodných dat.
|
|
|
Virtualization for the x86 platform
Müller, Pavel ; Kyselý, František (referee) ; Pelka, Tomáš (advisor)
A thesis describes a virtualization of x86 platform. In the first part the virtualization, its utilization and specific types of virtualization are described in a general way. The specific types of virtualization are full virtualization, paravirtualization, virtualization on core level, hardware virtualization and application virtualization. There is also described a general function of virtual machine, reasons of virtualization implementing, current development, focusing on future development and virtualization security. In the second part the thesis tries to find a solution with establishment charges of virtualization. To test purposes the following software programs were used. The first one is freeware benchmark Sandra from SiSoft company and second one is a software created on the basis of the thesis. For the tests the CPU overhead both an arithmetic-logical unit and a unit for work with numbers and floating decimal point, a RAM data transmission efficiency and a hard disk logging rate were chosen. The following test machines were described: VMWare, VirtualBox and Xen. In the third and the last part of the thesis is a description of network interface virtualization methods with a utilization of tun and tap system. In each particular step a virtual network interface creation and implementation are presented. Model situations of communication among virtual and physical machines with usage of these devices are described at the end of the thesis.
|
|
|
Virtualizace síťové brány Juniper pro výukové účely
Němec, Jiří
This bachelor thesis deals with principles of virtualization of computers, networks and network elements, especially the vSRX firewall. The theoretical part is devoted to the approaches to virtualization nowadays and virtualization software. In the practical part, an application for controlling a small virtualized network designed for educational purposes containing vSRX firewalls is created and described.
|
|
|
Laboratory scenarios explaining the basics of communication protocols
Pokorný, Karel ; Burda, Karel (referee) ; Jeřábek, Jan (advisor)
The goal of this thesis was to design two complex scenarios with focus on different kinds of transmission in packet-switched networks. First scenario is about ARQ (Automatic Repeat Request) protocols. It consists of introduction to Stop-and-Wait, Go Back N and Selective Repeat protocols and their comparison. Second scenario compares unicast, multicast, broadcast and anycast transmission methods. Both scenarios use applications which can simulate particular methods or protocols. These applications along with virtual environments are used for demonstration of characteristics of these methods/protocols.
|
|
|
Virtualization of computing machines and operating systems
Kadlíček, Jan ; Burget, Radim (referee) ; Novotný, Vít (advisor)
This bachelor thesis is about virtualization of machines and learning how to work with virtualization technologies, such as VirtualBox, VMware, Hyper-V, Docker Container, this paper also compares their parameters. Important part of this paper is to choose the best virtualization technology for tracking on Department of Telecommunications, based on results of tests.
|
|
|
Laboratory scenarios describing DNS system
Sakala, Peter ; Langhammer, Lukáš (referee) ; Jeřábek, Jan (advisor)
The master’s thesis deals with Domain Name System (DNS) and its practical use. It describes hierarchy of domain names, resource record types, protocol used, as well as DNSSEC extension. The most utilized implementations of authoritative and recursive DNS servers are presented. Virtualization, containers and other tools with potential use in labs are described. Two lab scenarios in virtualized environment with instructions for students were designed and developed in this thesis.
|
|
|
Virtualisation tools in theory and practice
Petrbok, Lukáš ; Halbich, Čestmír (advisor) ; Vaněk, Jiří (referee)
The bachelor thesisi deals with the using virtuliazion on personal computer, where this technology has also use. It defines all possible types of virtualization from emulation after full virtualization. It also characterizes new technology Docker which use software containers. The practical parts evaluates four virtualization platforms for operating system Ubuntu. And it is like after funcitional page, so like primarily after performance page using test focused mainly on performance of central procesing unit, but also on read and write speed on hard disk and operating memory. In the end of work is recommended virtualization platform, but decision is not clear and it depends on user requests.
|
|
|
Virtual Machine Management System
Skála, Milan ; Zachariášová, Marcela (referee) ; Dolíhal, Luděk (advisor)
This thesis focuses on design and implementation of the application for remote management of virtual machines that will be able to manage the virtual machines automatically. It describes a motivation for deployment of virtualization technology in companies and corporations, various virtualization methods altogether with their assessment from the practical point of view. The existing, globally widespread solutions, are also analyzes in the thesis. The application, which will be able to remotely control virtual machines, is designed and implemented in the practical part of this thesis. The final part describes possibilities of further extensions of the application.
|
|
|
Virtualisation as a data network simulation apparatus
Chapčák, David ; Burda, Karel (referee) ; Krkoš, Radko (advisor)
This bachelor’s thesis deals with the use of virtualization, especially for data network simulation. The theoretical part deals with virtualization including virtualization division into groups and evaluate the advantages and disadvantages of virtualization. The following part describes several common virtualization tools. The majority of the text is devoted to simulation and presents several network simulators, which use virtualization. In the next part several experimental networks that are currently operating are described. Furthermore the measurement portion is realized where the measured parametres gathered from virtual network are compared with data measured in real network. The final section summarizes the results and draws conclusions.
|
guest ::
