Abstract: The present invention is directed to a system and a method for roaming in data and/or communication networks, and to a corresponding computer program and a corresponding computer-readable storage medium, which can be used, in particular, to enable users in rapidly moving vehicles to use the Internet. A system for roaming in data and/or communication networks is proposed for clients moving at a high speed, wherein access points (AP) are arranged along the travel route of the clients for providing wireless access to data and/or communication networks, for example the Internet, wherein at least one AP is connected directly via a communication link with the data and/or communication network, and wherein APs without a direct connection to the data and/or communication network are connected to APs that have a direct connection to the data and/or communication network.