2.2.2 ECHO_RESPONSE_PDU
The ECHO_RESPONSE_PDU message is a client-to-server PDU that is used to echo the sequence of bytes transmitted in an ECHO_REQUEST_PDU message (section 2.2.1). The ECHO_RESPONSE_PDU message MUST be sent only in response to an ECHO_REQUEST_PDU message.
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echoResponse (variable) |
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echoResponse (variable): A variable-length array of bytes containing the message that was transmitted in the echoRequest field of an ECHO_REQUEST_PDU message (section 2.2.1).