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Roaming in WiFi networks
Labuda, Adam ; Číka, Petr (referee) ; Krajsa, Ondřej (advisor)
This work deals with roaming issues in the WiFi network. Takes options from a 802.11 standard view. Factory setting options for fast roaming from CISCO and MikroTik. It proposes to measure and test these networks.
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Advanced Utilization of Network Analyzers
Novák, Přemek ; Polívka, Michal (referee) ; Škorpil, Vladislav (advisor)
This bachelor´s thesis consists of description of the laboratory network Cisco and any of its components. Furthermore, the possibility of network analysis according to the standards RFC 2544 and EtherSAM and description of the measurement using analyzer Vepal TX300, Fluke NTS II and Sunlite E1 used in lab reports. In the first task, the characteristics of network elements are analyzing. In the second task, parameters of Cisco network are examined and the third task is focused on the E1 frame.
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Multicast Distribution Trees Modelling in OMNeT++
Malik, Adam ; Ryšavý, Ondřej (referee) ; Veselý, Vladimír (advisor)
Support of multicast routing and its implementation is one of the main goals in nowadays computer networks. Adapting new technology could be often challenging and connected with difficulties. For this reason its better to try it in some simulating enviroment and implement it only after successful results of tests and simulations. The aim of this diploma thesis is to familiarize the reader with the multicast routing, describe the possibilities of network testing in OMNeT++ and come up with new multicast routing framework for this discrete simulation tool.
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CISCO security laboratory exercise
Švec, Martin ; Hajný, Jan (referee) ; Pelka, Tomáš (advisor)
The main purpose of this diploma thesis is to become familiar with the principles and technical solutions regarding security components of Cisco company and configure assigned system according to valid rules of security. In introduction are explained the reasons for networks security solutions. This work also analyses different kinds of security weaknesses which include deficiencies of networks protocols and also the attacks from hackers. The principle of firewall is described and also its particular types. This work is focused on explanation and classification of PIX firewall, which has dominant role in the field of network security. The other equipments of Cisco, which are improving the level of security, are also mentioned. The practical part of this diploma thesis is composed of networks connections and configuration of system consisting of router, PIX firewall and switch. It also includes the detailed procedure and description of configuration of network equipments. The focus is put on minimalization of threats and elimination of DoS attacks.
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Protocols Analysis of CISCO Networks
Karlík, Martin ; Kenyeres, Martin (referee) ; Škorpil, Vladislav (advisor)
ABSTRACT Bc.Karlík, Martin Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology. Analysis of CISCO networking protocols This semestral thesis is focused on CISCO networks and protocols like MPLS, BGP, Ipv4, Ipv6, Multicast – sprase / dense mode. The task was study of those protocols and design and implement lab excercise with one of those protocols by using free network simulator GNS3. In this excercise is used CISCO router 3745.
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Simulation of Network Behaviour Based on Analysis of Configuration of Active Network Devices
Macků, Jiří ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
This masters thesis describes simulation of network using Network Simulator. Model of network and description of simulation is extracted from the analysis of configuration files of active network devices, and translated by a parser. Concept and implementation of the parser is described here. Because IPv4 addressing is not supported in Network Simulator, it was added as a new module. The Network Simulator is also extended by filtering properties of packets using access control lists. Practical usage of the implemented modules is demonstrated on a simulation of real network.
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Laboratory Monitoring System
Bošeľa, Jaroslav ; Křepelka, Václav (referee) ; Škorpil, Vladislav (advisor)
This bachelor thesis deals with network monitoring solution for school laboratory network. Describes the laboratory network devices, their purpose and condition before applying configuration, it also contains a comparison of commercial supervision network systems and the choice of one that has been used. The essence of the thesis is focused onto SNMP protocol, its use in laboratory network monitoring. In the practical part of the thesis is created the system supervision configuration, which is applied into laboratory network and ensures the supervision and monitoring for whole laboratory network.
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Evaluation of MPLS approach as a WAN technology for data transmissions in critical information infrastructure
Formánek, Juraj ; Blažek, Petr (referee) ; Fujdiak, Radek (advisor)
Thesis deals by using MPLS technology in energy critical information infrastructure and its comparison with another modern approach in the area of the WAN management. For this purpose was chosen a Software-defined Wide Area Network technology. This thesis contains theoretical description and practical tests of particular MPLS technologies on the WAN topology, which is considered as a virtual real topology of the EG.D’s company. Test were simulated in GNS3 emulator, using Cisco routers. Practical test were firstly focused on availability test when link or node failure occurs and secondly on route- reflector failures. Conclusion sums up appropriate approach for data transmissions in critical information infrastructure based on informations or practical test in this thesis.
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Modelling Cisco Router in Simulation Tool OMNeT++
Sivák, Vladimír ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
This bachelor's thesis describes simulation of computer networks using open source simulator OMNeT++ including the INET Framework extension. According to real behaviour of Cisco routers, we implemented a new modul for the INET Framework extension. Casy study compares behaviour of real network with simulation of the same network in OMNeT++ using the implemented modul.
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Voice Service in Integrated Networks
Yeftsifeyeu, Aliaksandr ; Polívka, Michal (referee) ; Škorpil, Vladislav (advisor)
The master’s thesis presents routing protocols, SIP handshake, describes modern VoIP networks and its features. Thesis is primary focused on networks with integrated MPLS. The most known advantages and disadvantages were described of modern network based on such technology. Further, networks and a router with installed Cisco Call Manager Express 7.1 were configured, which is provided by CISCO. For recreating of fully working telephone network IP PBX10 has been used from SMC Networks. For connection between different phones within these integrated networks, SIP trunk was configured on SMC PBX10 as well as on router, which is connecting three configured Cisco IP phones. Each phone has its own number according to the dial plan. For calls from one network to another the special pattern has been established, so the number of each caller can be easily identified by added digit. On one of the CISCO routers was shown a configuration of MPLS and OSPF protocols. With an analyzer VePAL TX300e, the lab network has been measured to analyze QoS parameters of the network according to standard RFC 2544. Thesis also gives references to lab devices, which have been used accordingly to the work.
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