I have 4 Sites.
Each Site has a DC.
Under each DC's NTDS Settings there are 3 Connections i.e. one to each of the other DCs.
Inter-site links are reliable and have good bandwidth i.e. 50Mb or above.
All 4 Sites are in a single Site Link with a Cost of 100 and a Replication Interval of 30 minutes.
Is this setup optimal, especially in terms of the single Site Link setup?