多项选择题

A. In ad hoc mode, the Independent Basic Service Set (IBSS) is a framework in which mobile  clients connect directly without an intermediate access point.
B. In Infrastructure mode, the Basic Service Set (BSS) is a framework in which mobile clients use  a single access point for connecting to each other or to wired network resources.
C. In Infrastructure mode, the Extended Services Set (ESS) is a framework in which two or more  Basic Service Sets are connected by a common distribution system (DS).
D. In Infrastructure mode, the Independent Basic Service Setet (IBSS) is a framework in which  mobile clients connect directly without an intermediate access point.
E. In ad hoc mode, the Basic Service Set (BSS) is a framework in which mobile clients use a  single AP for connecting to each other or to wired network resources.
F. In ad hoc mode, the Extended Services Set (ESS) is a framework in which two or more Basic  Service Sets are connected by a common distribution system (DS)