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Increasing Reliability of Communication Networks
Hausner, Richard ; Komosný, Dan (referee) ; Koton, Jaroslav (advisor)
The bachelor's thesis deals with selected options for increasing reliability of communication networks. The basic protocols and network topologies are described in the thesis. In the second section the technologies of cascading, clustering and stacking network switches are discussed. The practical experiments and scenerios of connections, which are described in the aforementioned section, form a basis of their practical use proposal.
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Multiple redundancy computer network topology design
Šimončičová, Lenka ; Sedlák, Petr (referee) ; Jordán, Vilém (advisor)
Master thesis deals with the design of network topologies with multiple redundant links for investor’s local area network. The objective of the thesis is to design more topology proposals according to investor’s requirements and applied technologies. Design is based on an analysis of the current state, which describes current topology of investor’s network. The main part of the thesis proposes a solution based on currently available network redundancy protocols. The functionality of the proposed solutions is tested in laboratory conditions. Finally, the individual variants are compared and their individual benefits evaluated.
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Basic properties of network protocols and communication techniques
Cigánek, Josef ; Jeřábek, Jan (referee) ; Dvořák, Jan (advisor)
The diploma thesis is focused on the basic properties of network protocols. The main task is to create laboratory tasks that deal with the basic features of network protocols and communication techniques, along with detailed instructions for students of communication technologies. The theoretical part of thesis acquaints the reader with the topic of computer networks and the basic network protocols of the TCP/IP architecture, which occur within the created lab. The practical part contains a selection of testing environment and subsequent description of installation and preparation of selected GNS3 environment. Finally are presented labs, which have been created. First lab deals with the basic differences between TCP and UDP. The second lab is focused on the issue of multicast and the third deals with the basics of penetration testing.
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Extension of FTP Implementation within libcurl
Raiskup, Pavel ; Peringer, Petr (referee) ; Dudka, Kamil (advisor)
This work elaborates on the design and implementation of an extension to the multiprotocol network library known as libcurl. The extension focuses on using the FTP protocol as found in libcurl, making it possible to download bundles of files that are specified by a matching pattern extracted directly from a URL. In addition to being readily available to and easily understood by libcurl users, the extension aims to allow efficient communication with FTP servers. Taking into account that libcurl is widely used by applications and other libraries, the main design criterion of this project was to maintain backward compatibility with libcurl. Like libcurl, this extension is also written in the C programming language.
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Security testing of selected network protocols and related vulnerabilities
Böhmová, Monika ; Šeda, Pavel (referee) ; Jeřábek, Jan (advisor)
This thesis focuses on problematics of IPv6, ICMPv6 and DNS protocols, vulnerabilities and testing of aforementioned protocols. Methods of testing including black-box, whitebox and grey-box are explained. Testing instances and scenarios are listed for black-box and white-box testing methods. Furthermore manual and automated testing with use of tools is differentiated. Thesis also includes creation of testing environment and tool for automated testing. Environment is created using a software tool for virtualization of network infrastructure and its elements using GNS3 tool. Tool for automated testing is created with the use of Python 3 programming language. This tool includes scripts which test devices present, settings of connected networks and verify device vulnerability to Man in the Middle attack. Testing of the tool on its own is performed using the created testing environment with various types of end devices which influence the progress and results of the tests which are the output of the automated testing tool either in human readable or machine readable formats.
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Vulnerability Detection in Computer Network
Šuhaj, Peter ; Hranický, Radek (referee) ; Holkovič, Martin (advisor)
Bachelor's thesis deals with analysis of chosen network protocols, finding their vulnerabilities and with designing and implementation of a tool for their detection. A vulnerability, for example, is using unencrypted communication. First of all the chosen protocols are studied, next methods for capturing and processing network traffic are analyzed. Based on research the design of the tool for detecting vulnerabilities is created and design of the format of vulnerabilities is created. Afterwards the implementation of the design is created in language Python and YAML configuration files are created containing entries of vulnerabilities. The program checks the input PCAP based on the content of these files. Testing took place on files of different size containing captured network traffic.
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Security testing of selected network protocols and related vulnerabilities
Böhmová, Monika ; Šeda, Pavel (referee) ; Jeřábek, Jan (advisor)
This thesis focuses on problematics of IPv6, ICMPv6 and DNS protocols, vulnerabilities and testing of aforementioned protocols. Methods of testing including black-box, whitebox and grey-box are explained. Testing instances and scenarios are listed for black-box and white-box testing methods. Furthermore manual and automated testing with use of tools is differentiated. Thesis also includes creation of testing environment and tool for automated testing. Environment is created using a software tool for virtualization of network infrastructure and its elements using GNS3 tool. Tool for automated testing is created with the use of Python 3 programming language. This tool includes scripts which test devices present, settings of connected networks and verify device vulnerability to Man in the Middle attack. Testing of the tool on its own is performed using the created testing environment with various types of end devices which influence the progress and results of the tests which are the output of the automated testing tool either in human readable or machine readable formats.
|
|
|
Increasing Reliability of Communication Networks
Hausner, Richard ; Komosný, Dan (referee) ; Koton, Jaroslav (advisor)
The bachelor's thesis deals with selected options for increasing reliability of communication networks. The basic protocols and network topologies are described in the thesis. In the second section the technologies of cascading, clustering and stacking network switches are discussed. The practical experiments and scenerios of connections, which are described in the aforementioned section, form a basis of their practical use proposal.
|
|
|
Basic properties of network protocols and communication techniques
Cigánek, Josef ; Jeřábek, Jan (referee) ; Dvořák, Jan (advisor)
The diploma thesis is focused on the basic properties of network protocols. The main task is to create laboratory tasks that deal with the basic features of network protocols and communication techniques, along with detailed instructions for students of communication technologies. The theoretical part of thesis acquaints the reader with the topic of computer networks and the basic network protocols of the TCP/IP architecture, which occur within the created lab. The practical part contains a selection of testing environment and subsequent description of installation and preparation of selected GNS3 environment. Finally are presented labs, which have been created. First lab deals with the basic differences between TCP and UDP. The second lab is focused on the issue of multicast and the third deals with the basics of penetration testing.
|
|
|
Multiple redundancy computer network topology design
Šimončičová, Lenka ; Sedlák, Petr (referee) ; Jordán, Vilém (advisor)
Master thesis deals with the design of network topologies with multiple redundant links for investor’s local area network. The objective of the thesis is to design more topology proposals according to investor’s requirements and applied technologies. Design is based on an analysis of the current state, which describes current topology of investor’s network. The main part of the thesis proposes a solution based on currently available network redundancy protocols. The functionality of the proposed solutions is tested in laboratory conditions. Finally, the individual variants are compared and their individual benefits evaluated.
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