A method for establishing an Internet access by using a wireless local area network communication protocol from a mobile client station, via an access point to be chosen from a set of identified Internet access points using this protocol, comprising the following steps: - a general database containing all of the identified access points with connection information specific to each access point is provided, - the mobile client station requests Internet access by using said protocol, successively moving through the following phases: browsing through at least a portion of the identified access points in order to list those detected as accessible by the mobile client station; selecting one of the access points previously listed; requesting an association of the mobile client station with the selected access point; authenticating the mobile client station in the access point that was just associated with it; configuring IP parameters of the mobile client station, - the Internet access of the mobile client station is established via the selected access point using the IP parameters configured, and - before the step of requesting the Internet access by using said protocol and independently of this step, the mobile client station downloads the connection information of at least a portion of the access points of the general database into an onboard database of the mobile client station, characterized in that: - the downloadable connection information specific to each access point identified in the general database comprises at least a location or geographic coverage area of the access point in question and performance characteristics of the access point in question, - the phase of browsing through is carried out on the basis of the information of location or geographic coverage previously downloaded in the onboard database of the mobile client station to list the access points detected as accessible by the mobile client station, without soliciting the general database and the identified access points, and - the phase of selecting is carried out on the basis of the performance characteristics previously downloaded in the onboard database of the mobile client station, without soliciting the general database and the identified access points. - a general database containing all of the identified access points with connection information specific to each access point is provided, - the mobile client station requests Internet access by using said protocol, successively moving through the following phases: browsing through at least a portion of the identified access points in order to list those detected as accessible by the mobile client station; selecting one of the access points previously listed; requesting an association of the mobile client station with the selected access point; authenticating the mobile client station in the access point that was just associated with it; configuring IP parameters of the mobile client station, - the Internet access of the mobile client station is established via the selected access point using the IP parameters configured, and - before the step of requesting the Internet access by using said protocol and independently of this step, the mobile client station downloads the connection information of at least a portion of the access points of the general database into an onboard database of the mobile client station, - the downloadable connection information specific to each access point identified in the general database comprises at least a location or geographic coverage area of the access point in question and performance characteristics of the access point in question, - the phase of browsing through is carried out on the basis of the information of location or geographic coverage previously downloaded in the onboard database of the mobile client station to list the access points detected as accessible by the mobile client station, without soliciting the general database and the identified access points, and - the phase of selecting is carried out on the basis of the performance characteristics previously downloaded in the onboard database of the mobile client station, without soliciting the general database and the identified access points.