SYN/Segment Retransmission Interval

Me again! I've searched askf5 but can't find anything on what the SYN and Segment retransmission interval is except for one article for v10.x only suggesting it's 1s if there are valid Congestion Metrics Cache information, 3s if not or if the feature is disabled, SYN retransmission only.

 

 

Also, in a TCP Profile, there is this setting: Initial Retransmission Timeout Base Multiplier for SYN Retransmission but I also can't find any detail about this.

 

 

Does anyone have any further information?