This Integer32, ranging from 0 to 65532, reports the segment size currently used for this transport connection when a non-zero value has been configured; a value of 0 means cnt2TransportSegmentSizeHi is being used instead. An admin cares about this because segment size affects how data gets chunked onto the wire, which in turn affects efficiency and fragmentation. For example, seeing this object read 0 tells the admin to check the Hi variant to learn what segmentation size the connection actually settled on.