How SPXII works
Backward compatibility with SPX
Large packets
Large packet negotiation
Windowing protocol
SPXII packet structure
SPXII header fields
SPXII data flow
Data packet format
SPXII ACKs
SPXII NAKs
Sequence of data packets without a NAK
Sequence of data packets with a NAK
SPXII connection management
Connection establishment packets
Session termination packets
Watchdog
Renegotiation
Negotiating other values between endpoints
SPXII windowing algorithm
Positive and negative acknowledgments
Variable window size
Error recovery
Data packet timeout
SPXII programming interface