Sociální a komunitní sítě

The aim of thesis is to examine and compare the most important world and Czech internet social networks. For these social networks then secondly to describe the benefits to society and their usability in marketing, but also their seamy sides which represent a danger for users. The objectives of this thesis are the exploration of the internet and book resources and their evaluation. Another source of support for the research results is an Internet questionnaire. This bachelor thesis is divided into four main parts. The first explains the theory of the social and community networks, Web 2.0 and Semantic Web. The second part describes the various social networks and compared their basic services. This is followed by a summary of trends in social networks, the benefits and dangers of social networks. In the last part are presented the results of Internet surveys and reflection on the ideal social network. Benefit of this thesis is to create an overview of most social networks and alert readers to the dangers of these social networks. In reflecting on the ideal social network, describes how this social network might look like, what would allow and how it was solved. Poll among Internet users, shows the view of respondents on the issue and their behaviour in social networks.