Method for ascertaining an address for a communication terminal

摘要

The invention relates to a method for ascertaining an address for a peer communication terminal which holds a file. If peer communication terminals (P 1 , P 2 ) repeatedly send request messages (N 1 , N 2 ) to a first index server (IS 1 ), with the request messages relating to a file (D) and with the first index server (IS 1 ) not storing an address for a peer communication terminal which holds this file (D), then an interrogation device (AE) automatically ascertains an address (IP 3 ) for a peer communication terminal (P 3 ) which holds this file (D). This address (IP 3 ) is transmitted to the first index server (IS 1 ) by the interrogation device (AE). The first index server (IS 1 ) then stores this address (IP 3 ), so that when a further request message relating to this file appears the first index server (IS 1 ) is able to provide this address (IP 3 ) in response to the further request message.