Indicates the default assigned trust state.
If trustCos(2) is specified, the default DSCP value of an
unmatched packet should refer to caqCosToDscpDscp
object in caqCosToDscpTable to transfer layer 2 CoS value to
DSCP value.
If trustIpPrec(3) is specified, the default DSCP value of an
unmatched packet should refer to caqIpPrecToDscpDscp
object in caqIpPrecToDscpTable to transfer IP Precedence value
to DSCP value.
If trustDscp(4) is specified, the default DSCP value of an
unmatched packet is the one which packets carry.
If noTrust(1) is specified, the default DSCP value of an
unmatched packet will have the value of caqQosDefaultDscp
object.