Server Redundancy Ports and protocols

Hello

We are develop the redundancy Servers Configuration and we need get further information from Help but we can't find it.  

  • What server synchronization services use which communications protocols and ports for this service? Does synchronization depend on any communication in Broadcast?
  • Do the servers for synchronization depend on a dedicated network port for the service?

 

Do you know where I can get this information.  

Thank you