Total number of responses to authentication
requests received. Response could be a NAK
or an ACK. Value should match radAuthLoginRqstSent.
The sum of this value and 'radAuthOtherRspRcvd',
'radAuthUnexpRspRcvd', and 'radAuthBadRspRcvd'
represents the total number of responses
received (excluding those related to RADIUS
accounting).