This attribute shall specify the type of BSS the
station shall use when scanning for a BSS with which
to synchronize. This value is used to filter Probe
Response frames and Beacons. When set to infrastructure,
the station shall only synchronize with a BSS whose
Capability Information field has the ESS subfield set
to 1. When set to independent, the station shall only
synchronize with a BSS whose Capability Information
field has the IBSS subfield set to 1. When set to
any, the station may synchronize to either type of
BSS.