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Wireless Network
Vincour, Jan ; Popelka, Dušan (referee) ; Koch, Miloš (advisor)
The focus of this Bachalor`s thesis is the design and realization of the wireless network in the company LINDEN s.r.o. The goal is to extend the current WiFi coverage to the entire company and fulfill the company`s requirements on the network availability and security.
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Wi-Fi enabled sensor node
Usnul, Jan ; Gutman, Jiří (referee) ; Hynčica, Ondřej (advisor)
This work evaluates uses of standard IEEE 802.11 in automatization industry specifically in measurement industry. This work measures and evaluates chip CC3200 from Texas Instrument company, which include processor Cortex M-4 from ARM company and network procesor CC3100 from Texas Instrument company integrated in one chip.
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Wireless Fidelity Networks
Gajdoš, Jan ; Ing.Lukáš Černý (referee) ; Koch, Miloš (advisor)
This work deals with main problems of wireless fidelity networks. In details it’s showing the terminology, used technical standards, network’s architecture and built-in security of wireless fidelity networks. For the question of the network’s security it’s handled regarding to VPN (Virtual Private Network) technology. Based on these theoretical assumptions there is new company’s network designed. This designed network offers combination of free wireless network with internet access and secured access to the private’s corporate LAN using VPN technology. Main aspect is to keep maximum available security, low costs and possibility to realize this design for already existing historical object.
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Optimization of hand-over process in real network environment
Hornyak, Tomáš ; Skořepa, Michal (referee) ; Molnár, Karol (advisor)
This Master´s thesis deals especially with exploration of the handover process and with searching for ways of in?uencing this process. The goal of this thesis is to create tools for recording of access point utilization and in?uence the handover of wireless clients based on the obtained data. An access point with open ?rmware, which allows low-level management, was necessary for practical tests. First chapter deals with a survey of current o?er of open ?rmware available for access points and then the appropriate candidate for this thesis is chosen – the OpenWRT project. Second chapter deals with the con?guration of OpenWRT system and basic settings of the chosen wireless router – TP-Link TL-WR1043ND. Next chapter deals with analysis of the handover process in wireless networks. Information obtained by this analysis is used during the creation of the graphic application. The fourth chapter presents the basics of Microsoft Native Wi-Fi API and introduces basic functions used by this API. Those functions were used during the creations of the application. Last two chapters present the created graphic application. The ?fth chapter deals with the application design and examination of its functionality and used functions. Last chapter then documents usability of the application in real environment.
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Security of wireless computer networks
Jelínek, Martin ; Pelka, Tomáš (referee) ; Doležel, Radek (advisor)
The master's thesis deals with the issue of Wireless Local Area Network (WLAN) from the viewpoint of the security and functional principle of security mechanisms. The transition to the issue concerning the security is accompanied by the methods of wireless data transmission operating on the level of physical layer (FHSS, DSSS, OFDM, MIMO), which is followed by the summary of individual 802.11 standards. The next part deals with the issue of shared transmission medium (CSMA/CA), influence of interference and correcting mechanisms (RTS/CTS). Within the security, the principles of the authentication along with the commonly used methods of security (WEP, WPA, WPA2) are described in detail. The first part concerning security deals with the security in the form of the WEP protocol, which is considered insufficient nowadays and points out the imperfect implementation and the consequent risks. The following part describes the security in the form of WPA which eliminates the implementation weaknesses of the previous WEP security protocol. The description of commonly used mechanisms of authentication (PSK, 802.1x), required temporary key management (PTK, GTK), data integrity (MIC) and encryption which uses TKIP protocol are also included. The last part, possible WLAN security, is aimed at the full support of 802.11i standard, which is called WPA2 (sometimes RSN). That part describes the basic encryption security element CCMP, which is based on the AES block cipher modes. The practical part of the thesis deals with the security verification of current wireless networks. In the process of verification the accessible HW means and programming tools of Open Source Software (OSS) are used. By means of verification it has been pointed out that there are possible security risks resulting from the security method which has been used. Also several recommendations how to reduce the security risks of the used method to minimum are mentioned.
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Wireless Networks
Harant, Vladimír ; Šimek, Václav (referee) ; Koch, Miloš (advisor)
This document generally concerns of wireless networks. It provides an overview about commonly used standards for wireless networks and their extensions, analyzes the most spread standards for its security and presents architecture of wireless networks. Next follows design of a business network and its securing, regarding trouble free implementation, affordability and high level of security required.
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Wireless Network
Pech, Martin ; Neuwirth, Bernard (referee) ; Koch, Miloš (advisor)
This bachelor's thesis deals with wireless networks and related issue. It includes an overview of basic terminology commonly connected with Wi-Fi technology. Moreover, it includes a network implementation design, which offers a freely accessible Wi-Fi network with an available Internet connection as well as a secured connection of a newly introduced restaurant till system. The design takes into consideration a limited budget and the need to ensure sufficient security.
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Wireless Fidelity Networks
Řezníček, Milan ; Taft, Karel (referee) ; Koch, Miloš (advisor)
In this bachelor´s thesis I deal with the problems of wi-fi networks, concretely their security. The results of surveying are mentioned in the practical part of my work, in which I wanted to find out if at least 50% of wi-fi networks in several cities of Břeclav region are secured by WEP or WPA. Proposals how to improve wireless network security by some types of networks are mentioned in conclusion of my thesis.
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Auto Rate Fallback (ARF) algorithm for wireless connection according to the standard 802.11g.
Zarković, Luka ; Mašek, Pavel (referee) ; Kubánková, Anna (advisor)
This bachelor thesis deals with problems of adaptation protocols and their implementation. In this bachelor thesis are described physical and MAC layers of standard 802.11g and theoretical analysis of adaptation protocols ARF and AARF. Further, the thesis describes the process of creating a network model suitable for testing and verifying the properties of adaptive protocols in the simulation environment NS-3 (Network Simulator 3). In the last part, the simulation results are described and processed into suitable graphs.
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