The WLAN system support the following cipher type for data frame
encryption.
wep40(2)
tkip(4)
aesccmp(16)
wep104(32)
wpisms4(64)
wep128(128)
For each service policy, it could support multiple cipher types at
the same time. So the value of object could combine multiple value
of cipher type above.
When the value of node equals to zero, it means no configuration or
undo operation.