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Design of laboratory tasks focused on the OLSR protocol.
Pecina, Martin ; Langhammer, Lukáš (referee) ; Kubánková, Anna (advisor)
An ad hoc mobile network is a collection of mobile nodes that are dynamically and arbitrarily located in such a manner that the interconnections between nodes are capable of changing on a continual basis. In order to simplify communication within the network, a routing protocol is used to discover routes between nodes. The primary goal of such an ad hoc network routing protocol is correct and efficient route establishment between a pair of nodes so that messages may be delivered on time. Route construction should be done with a minimum of overhead and bandwidth consumption. This document describes the Optimized Link State Routing (OLSR) protocol for mobile ad hoc networks. The key concept used in the protocol is that of multipoint relays (MPRs). MPRs provide an efficient mechanism for flooding control traffic by reducing the number of transmissions required.
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Effective utilization of converged network
Nesveda, Marek ; Vychodil, Petr (referee) ; Škorpil, Vladislav (advisor)
The Master´s thesis deals with the field of converged networks and their effective utilization, focusing specifically on telematic networks. For modelling of a specific application, the field of vehicle telematics has been chosen. The thesis consists of two series of simulations performed in Opnet Modeler network simulator. The first theoretic part gave an overview of protocols used in converged networks, with a more detailed description of routing protocols. The attention also centred on the mechanisms for assuring the quality of service in IP. The subsequent practical part consisted in creating the simulation of a converged telematic network in Opnet Modeler network simulator, configuration of scenarios for assuring QoS using RSVP and DSCP protocols and the simulation itself. The results of the simulations for both scenarios were compared and represented in graphic form. The second theoretic part described queueing disciplines, as well as congestion control and congestion avoidance mechanisms. The corresponding practical part compared FIFO, PQ and WFQ queueing algorithms within the same simulated converged telematic network, using DSCP protocol scenario, which gave much better results in the first series of simulations. Again, the results of the simulations were compared and represented in graphic form.
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Design of unicast and multicast models in NS2
Votava, Martin ; Burget, Radim (referee) ; Šimek, Milan (advisor)
This work is focused on Network Simulator 2 - tool used for simulating network implementations. Focal point of this work is simulating of unicast and multicast routing. This work also describes protocols used on transport layer, such TCP (Transmission Control Protocol) and UDP (User Datagram Protocol). Last but not least work includes laboratory part in which reader is able to verify reached knowledge in Unicast and Multicast simulation.
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Adaptive Linux firewalls, geographic firewalls
Najbr, Ondřej ; Kacálek, Jan (referee) ; Pelka, Tomáš (advisor)
The aim of the Bachelor's thesis is to study and describe the options of adaptive firewalling, which has a Linux firewall netfilter, and to study the advanced routing and marginally geographic IP filtering. In detail I will deal with the work with Iptables and its using in creation of firewalls for the Linux operating system. In the next section in detail I will describe the design and implementation Linux applications of creating rules in Iptables.
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Creation of laboratory exercises in the NS3 enviroment
Štefančík, Matej ; Langhammer, Lukáš (referee) ; Polák, Josef (advisor)
Diploma thesis provides an introduction to the ns-3 network simulator. It describes the basic abstactions and components of the instrument. This work further discusses the theory, which was applied during simulation creation. The concept of unicast, the issue of IP addressing and routing in networks are specificaly analyzed. The practical part is focused on the creation of four laboratory tasks within the scope of Advanced Communication Techniques. The first task is dedicated to the the issue of static unicast routing in the network. It clarifies the impact of metrics on the process of routing. The following task compares the different types of ICMPv4 and ICMPv6 messages. The third task discusses additional functions of the ICMPv6. Specifically, it focuses on five different types of ICMPv6 messages defined by NDP (Neighbor Discovery Protocol) and their role in the network traffic. The last task focuses on ensuring the quality of services (QoS) in wireless networks, by setting priorities and thereby dividing the traffic into different classes. Attention is focused on parameters such as throughput, delay and jitter.
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Analysis of routing protocols used in MANET networks
Vala, Ondřej ; Hošek, Jiří (referee) ; Kubánková, Anna (advisor)
This diploma thesis is analysis of routing protocols used in MANET networks focusing on protocols OLSR, AODV and HWMP. The work consists of a theoretical and practical part. The theoretical part describes the routing protokols, which are used in MANET networks and their applications to FANET networks. In practical part, there are describes of created mobility model in the NS-3, which are used for comparison routing protocols on the created scenarios of mobility according to the qualitative parameters of the networks.
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Routing protocols in scale-free topology networks
Mahdal, Ondřej ; Kyselý, František (referee) ; Skořepa, Michal (advisor)
This master's thesis (further only MT) deal with problems of scale-free topology networks with a view to technology MANET (Mobile Ad hoc network) or more precisely Motorola MESH. Further studies routing technique and quality of services (QoS) in these networks. Theoretic part of MT in introduction shortly characterizes properties and kind of Ad hoc networks, next part is dedicated to technology Motorola MESH and shows practical usage of this technology. Analysis of problems quality of services and optimalization QoS in MANET is content third parts of MT. Fourth part specifies division of routing protocols, analysis of routing in MANET and characteristics routing protocols OLSR, AODV, DSR and TORA. In practical fifth part of MT are in introduction simulated simple MANET and mesh networks and further is created model of MANET network, into the model are implemented accessible routing protocols in simulation program OPNET Modeler and on the basis of simulation these protocols or more precisely output statisticians of simulation are protocols compared from several aspects and suitability for transmission of multimedia data (voice, video).
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