What is raid-ac protocol on port 2012
As far I know RAID, it's a way to store data across multiple disks (HDD) acting like one.

There are multiple standard levels of them as explained on this Wiki (might be geeky as you say).

Based on that knowledge I would say the services works with redundancy in order to run smoothly. As you say yourself: Continuous Integration (as in, without interruption)


Please check source below: 


  UDP port 2012 uses the Datagram Protocol [red. that's what UDP means], a communications protocol
  for the Internet network layer, transport layer, and session layer.
  This protocol when used over PORT 2012 makes possible the transmission
  of a datagram message from one computer to an application running in
  another computer. Like TCP (Transmission Control Protocol), UDP is
  used with IP (the Internet Protocol) but unlike TCP on Port 2012, UDP
  Port 2012 is connectionless and does not guarantee reliable
  communication; it’s up to the application that received the message on
  Port 2012 to process any errors and verify correct delivery.
  source