When this attribute is TRUE, it indicates that some level of security is invoked for transmitting frames of type Data. For IEEE 802.11-1999 clients, the security mechanism used is WEP. For RSNA-capable clients, an additional variable coDot11RSNAEnabled indicates whether RSNA is enabled. If coDot11RSNAEnabled is FALSE or the MIB variable does not exist, the security mechanism invoked is WEP; if coDot11RSNAEnabled is TRUE, RSNA security mechanisms invoked are configured in the coDot11RSNAConfigTable. The default value of this attribute is FALSE.