Replication Server supports direct, indirect, and dedicated routes.
Direct Routes
A route with no intermediate sites is called a direct route. A system with direct routes results in network connections between source and destination Replication Servers.
Indirect Routes
A route with intermediate sites is called an indirect route.
Dedicated Routes
A dedicated route distributes only transactions for a specific primary connection. You can create a dedicated route to the replicate Replication Server to replicate high priority transactions or to maintain a less congested path for a specific primary connection.
Unsupported Routing Schemes
An intermediate Replication Server can accept transactions from one or more Replication Servers. Replication Server, however, does not support routing schemes in which routes diverge from the same source Replication Server, then converge at the same intermediate or destination Replication Server..