SRV Format
_Service._Proto.Name TTL Class SRV Priority Weight Port Target
_Service: Name of the service. Underscore to avoid collisions.
_Proto: Name of the protocol. Underscore to avoid collisions.
Name: Domain this RR refers to.
TTL: Standard DNS meaning
Class: Standard DNS meaning (SRV always in IN)
Priority: Between 0-65535. The target with lowest value must be contacted first.
Weight: Server selection for entries with the same priority
Port: Port on this target host of this service
Target: Domain name of the target host