Network monitoring systems generate a high number of alerts reporting on anomalies and suspicious activity of IP addresses. From a huge number of alerts, only a small fraction is high priority and relevant from human evaluation. The rest is likely to be neglected. Assume that by analyzing large sums of these low priority alerts we can discover valuable information, namely, coordinated IP addresses and type of alerts likely to be correlated. This knowledge improves situational awareness in the field of network monitoring and reflects the requirement of security analysts. They need to have at their disposal proper tools for retrieving contextual information about events on the network, to make informed decisions. To validate the assumption new method is introduced to discover groups of coordinated IP addresses that exhibit temporal correlation in the arrival pattern of their events. The method is evaluated on real-world data from a sharing platform that accumulates 2.2 million alerts per day. The results show, that method indeed detected truly correlated groups of IP addresses.

Thesis deal with geolocation in internet network. There are described possibilities of geolocation and thesis is mainly focused on passive geolocation methods. Under passive geolocation belongs location databases which there are described as in theoretical way as used in practical part of thesis. In practical part there is created complex system for geolocation in internet environment which used paid and free geolocation databases. Another used database is WHOIS. Data from paid databases is processed and accuracy of databases is evaluated.

This thesis is focused on finding the physical location of stations by the passive geolocation techniques, particularly using the registration database of IP addresses. The first two part are focused on a theoretical analysis of this problem, the next two parts of this thesis deal with the solution of this problem and discussion of the results.

Diploma thesis is focused on IPv6 protocol implementation in real company´s enviroment. In the beginning we are introduced with theoretical knowledge about this protocol. After analysis of current state of XXX spol s r.o. we can use this knowledge in practical part of thesis for proposal of possible solutions including physical devices.

This master thesis presents a topic of testing network address translation. It describes basic principles of network address translation and general methods for testing network devices. These methods are then applied on NAT devices. Thesis then introduces a design of a  framework for performing functional tests. The designed framework is then implemented as a part of the thesis and used to test a newly developed high-speed NAT application.

För full migrering till IPv6 behöver utbudet av datakommuniktionsstjänster anpassas för den nyagenerationens IP-protokoll med bevarad eller utökad funktionalitet. Detta examensarbetes mål äratt ta fram en eller flera lösningar som möter krav och tekniska förutsättningar för att utöka företagetDGC:s tjänst IP-VPN för IPv6. Detta innefattar adresstilldelningstekniker som prefixdelegeringoch automatisk adresskonfigurering i befintlig nätinfrastruktur.Lösningarna presenteras i sex framtagna scenarier som har undersökts utifrån tester, analys ocherfarna problem som uppstått. Undersökningen formade kriterierna skalbarhet, konfigurationenskomplexitet, kompatibilitet, RFC-stöd och krav från DGC som tas hänsyn till i utvärderingen avden bäst lämpade lösningen.Utvärderingen har gett ett resultat i form av ett rekommenderat scenario som är implementerbartenligt uppsatta mål.Tekniker som skulle kunna påverka valet av bäst lämpade lösning, men som inte är tillgängliga,diskuteras och presenteras för att poängtera vad som kan behövas tas i beaktande för framtiden. / Full migration to IPv6 brings the need to adjust datacommunication services for the new generationof IP protocols with maintained or expanded functionality. This thesis’ goals is to submitone or more solutions that meets requirements and the technical conditions that enables thecompany DGC:s to expand the service IP-VPN for IPv6. This includes address assignmenttechniques like prefix delegation and automatic address configuration in existing network infrastructure.Solutions are presented in six scenarios that have been investigated considering tests, analysis andexperienced problems. The investigation formed the criteria scalability, configuration complexity,compatibility, support by RFC:s and requirements stated by DGC that adds to the evaluationof the most suitable solution.The evaluation has resulted in a recommended scenario that is implementable according to givengoals.Techniques that may influence the choice of most suitable solution, but that is not yet available,are discussed and presented to point out what may needed to be considered in the future.

CPU-memory bottleneck is a widely recognized problem. It is known that majority of high performance computing (HPC) database systems are configured with large memories and dedicated to process specific workloads like weather prediction, molecular dynamic simulations etc. My research on optimal address mapping improves the memory performance by increasing the channel and bank level parallelism. In an another research direction, I proposed and evaluated adaptive page migration techniques that obviates the need for offline analysis of an application to determine page migration strategies. Furthermore, I explored different migration strategies like reverse migration, sub page migration that I found to be beneficial depending on the application behavior. Ideally, page migration strategies redirect the demand memory traffic to faster memory to improve the memory performance. In my third contribution, I worked and evaluated a memory-side accelerator to assist the main computational core in locating the non-zero elements of a sparse matrix that are typically used in scientific, machine learning workloads on a low-power embedded system configuration. Thus my contributions narrow the speed-gap by improving the latency and/or bandwidth between CPU and memory.

In this paper we study two speeches held by the chairman of the MEDEF, Pierre Gattaz, at the opening ceremony of the Summer universities in 2016 and 2017. The event is organised by the MEDEF, the leading network of entrepreneurs in France, every summer at the end of August. It is an important event gathering key people and decision-makers from the political and economical arena from France and abroad, and thus an ideal occasion for the network to put forward its claims on necessary changements and reforms to get in place in order to improve the entrepreneurial climat in France. We conduct a discursive analysis of the two speeches to see how the economical discourse in France is pronounced by the MEDEF and what specifically characterises it. We also look at the social and  political context to see how it impacts the speeches. Another important aspect is to study the image of the speaker and how it is constructed in the two speeches by analysing the expressions, vocabulary, disposition and demeanor. We also compare the common denominators and differentiators of both speeches.

Using Critical Discourse Analysis (CDA), this study seeks to illustrate how Donald Trump’s Inauguration Address incorporates elements of power which are embedded in various forms of American exceptionalism. Since the American myth of exceptionalism does not necessarily reveal itself at first glance, this thesis traces its variety of roots back in American history. By doing so, it explains how this myth emerged, how it became infused with power and how Trump’s rhetoric keeps it alive. The theoretical framework of this study is built on Michel Foucault’s writing on power and van Dijk’s concept of ideology. In addition, this study introduces the idea of legitimising myths in the context of Social Dominance Theory to highlight the effect ideologies have on societies. This thesis finds that some references to American exceptionalism in Trump’s speech can be attributed to the Colonial era. More specifically, Trump’s call for social cohesion, his allusions to predestination, his image of civilisation and his language on American labour bear close resemblance to Puritan discourses. Further, the theme of nationalism and limited government run through his speech, both of which are integral to American history and the myth of exceptionalism. In line with the general goals of CDA, this study exemplifies how ideologically charged language needs to be contextualised socio-historically to expose its relationship with power.

The purpose of this study is to explore the nature of socio-cultural rules underlying address behaviour in face-to-face interactions in Xitsonga. In the study, a socio-pragmatic approach is used. This approach is a combination of sociolinguistics and pragmatics. Data are collected using semi-structured interviews from 29 participants in Hlanganani region. Hlanganani is a Xitsonga speech community located in Limpopo Province, South Africa. The participants were selected in terms of five variables, namely their age, gender, marital status, educational status and occupation. Five theories are tested in this study, namely Brown and Gilman’s (1968) theory of power and solidarity, Brown and Levinson’s (1987) politeness theory, the theory of accommodation, the theory of universal grammar and the Gricean theory of conversation. The study finds that Hlanganani is an age-set society in that the age of a person is the primary determiner of address choice. The male gene also receives superior status in address behaviour in Xitsonga. It is also found that women are given the same lower status as children. It is observed that women’s statuses reflect their graduation in terms of marriage and the production of children. It is recommended that more studies of a similar kind should be undertaken based on either different speech communities or on a comparative basis of particularly African languages. Such studies will go a long way in describing similarities and differences in both the linguistic and the social structures of different cultures. / African Languages / D. Litt. et Phil. (African Languages)