The connection data (IP addresses) are treated anonymously, in form of general statistics, which allow the webmaster to monitor the activities, to identify and quantify errors and to ensure that the site is adapted to the number of connections.
The same applies if cookies or Java applets are implemented to improve the service. A cookie is a small text file that is sent via the selected web page on your browser. With this cookie information about your visit to the website will be stored. These cookies have a variety of uses, such as storing your search preferences, counting visitors of a website, date and time of connection peaks, performance of advertising campaigns, ...
Most browsers allow to manage cookies individually from site to site. You can reject the registration of these 'cookies' or 'Java applets' by configuring your browser accordingly (see operating instructions of your browser). It is possible that after this setting change certain features of the site are not functional anymore.