An entry in the extremeWirelessClientTable. It is possible
for there to be multiple IEEE 802.11 interfaces on one agent,
each with its unique MAC address. The relationship between an
IEEE 802.11 interface and an interface in the context of the
Internet-standard MIB is one-to-one. As such, the value of an
ifIndex object instance can be directly used to identify
corresponding instances of the objects defined herein. by
ifIndex.