This counts outbound SCTP data chunks sent with in-order delivery required (the U bit clear), excluding retransmissions, representing application data that must arrive at the peer in the exact sequence it was sent. Applications like file transfer or certain signaling protocols that depend on strict ordering will show most of their traffic here rather than in cSctpStatSentUnorderChunks. A steep drop in this counter's growth rate while cSctpStatSentUnorderChunks keeps climbing would indicate the application shifted its traffic mix toward unordered delivery, a meaningful behavioral change worth noting during a traffic profile investigation.