|
|
Measurement of Backbone Routing Parameters
Celárek, Ondřej ; Kořenek, Jan (referee) ; Matoušek, Jiří (advisor)
This thesis deals with issue of routing between Autonomous Systems. For routing between autonomous systems is used Border Gateway Protocol (BGP). The routers in Autonomous Systems modify their routing tables based on BGP messages. Routing tables are used for forwarding information on Internet. Issue of this thesis is analysis of change routing tables for eventually optimizing of routing architecture. First part of thesis is focused on theory of routers, routing ang BGP. Second part of this thesis focuses on implementation and execution experiments with routing tables. In this part are also described reached results.
|
|
|
Simulators for Wireless Sensor Networks
Capalini, Richard ; Nagy, Jan (referee) ; Zbořil, František (advisor)
Wireless sensor networks (WSN) were designed for purpose of monitoring physical phenomenons and controlling processes by sensors placed in nodes. There are three basic principles: detection of event (phenomenon), data capture and data processing in node. Afterwards data are transmitted to interested node. WSN typically consists of huge number of thousands nodes and one base station. Nodes cooperatively disseminate data towards a base station, which saved them to memory and provide access to users for example over Internet. This work report a comprehensive view of wireless sensor networks and routing tasks in sensor field. Practical part of work is aimed at simulation of choosen routing protocols placed in suitable models.
|
|
|
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.
|
|
|
Fault recovery in data networks
Trávníček, Michal ; Martinásek, Zdeněk (referee) ; Mácha, Tomáš (advisor)
The purpose of the bachelor’s thesis was to explain the basic principles and technologies for ensuring reliable and effective routing within networks when a link failure. This is with minimal effect to the quality of service. The focus was on mechanisms ensuring the quality of services within the network, especially differentiated services and the both groups of dynamic routing protocols – distance vectors and link state protocols. On the basis of obtained knowledge, the simulation has been designed in OPNET Modeler. It simulated routing of routing protocols RIP and OSPF of networks without any failure. The next simulations containted the link failure and the link recovery. Then the network with DiffServ was designed. It filtered data packets according to used ports and protocol and it added a label to packet with a priority for the certain service. The attention in the network was focused on the VoIP service and its parameters, such as jitter and end-to-end delay. It has also monitored the value of dropped traffic. It simulated the networks with the link failure and the link recovery. The results were compared to the network with no QoS and network with QoS but no failure.
|
|
|
Router principles illustrating software for teaching support
Sobek, Jiří ; Vymazal, Michal (referee) ; Vychodil, Petr (advisor)
This bachelor thesis is mainly focused on the network functionality and its key component, the router. The main points of this work are an explanation of the network principles and router functions which are extended with information about routing protocols and its mutual separation. The practical part considers a realization of applets which should serve as a school software. In detail they explain the way of routing protocols work and its inner structure. Simultaneously consider the principles of two significant routing protocols such as Open Shortest Path First (OSPF) and Routing Information Protocol (RIP). All of the applets are finally loaded on the web page which helps to their visitors understand the complexity of routing and other infomation.
|
|
|
Principals, switching functions and routing techniques in computer networks
Dvořák, Pavel ; Pelka, Tomáš (referee) ; Polívka, Michal (advisor)
This bachelor thesis consider main principles and function of active network components. Mainly is intent to component working on the third level of referential model ISO/OSI, router. There are described its main parts and more closely charactered routing protocols. Then is verified the ability of dynamic routing to react to failure in the network and there is measured the reaction time of crossing to secondary route when using different routing protocols. Another part of the thesis is focused on the questions of Quality of Service (QoS) and its support in computer networks. There are explored various ways of the QoS configuration on the routers and the proper of them is chosen and applied to the test network.
|
|
|
Usage of NS2 simulator in multicast networks
Hošek, Petr ; Mlýnek, Petr (referee) ; Koutný, Martin (advisor)
The thesis is focused on routing in data network, especially on network method of multicast. The first section closely deals with particular multicast protocols and next with models of multicast, mainly Any Source Multicast and Source Specific Multicast. The main point of this work is implementation of multicast using Network Simulator. On the practical level, two laboratory exercises are included. In this part, readers have the possibility to make sure of reached knowledge of multicast and its implementation in NS2.
|
|
|
Routing protocols metric determination in wireless sensor networks
Dušek, Martin ; Šimek, Milan (referee) ; Morávek, Patrik (advisor)
This bachelor’s thesis deals with wireless sensor networks (WSNs) in terms of routing protocols and metrics. There is described common view on these networks and their comparison with IP networks. In addition, some types of protocols, used in WSNs, are described and representatives of each type are included. There is also considered influence of metrics on a route selection and presented two methods of calculation. In conclusion, an application, that simulates the use of each type of metrics for path search and displays the differently evaluated paths, is designed.
|
|
|
Analysis and prediction of data traffic in mobile ad hoc network
Konečný, Daniel ; Koutný, Martin (referee) ; Hošek, Jiří (advisor)
The diploma thesis „Analysis and prediction of data traffic in mobile Ad Hoc network“ focuses on the radio propagation models of services in MANET (Mobile Ad-hoc) networks. It describes MANET networks and covers the theoretical analysis of routing protocols, radio wave propagation and propagation models of simulation enviroment NS-3 (Network Simulator 3). Furthermore, there is processed the creation process of model MANET networks with the routing protocol AODV (Ad Hoc On Demand Distance Vector) in the simulation environment NS-3. For analysis purposes there were implemented new functions to capture value of SNR (Signal to Noise Ratio) and throughtput. For this reason a physical layer of one of NS-3 model was modified. As an result there is a simulation build that compared several number of propagaion models.
|
|
| |
guest ::
