For both conserving network resources and ensuring that network administrators understand the needs for networks and public IP addresses for providing access to the APIs and storage network as necessary, this section offers recommendations and required minimum sizes. Throughput of at least 1000 Mbps is suggested. This document refers to three networks. One is a Public Network for connecting to the Proxy server. The second is a Storage Network that is not accessible from outside the cluster, to which all of the nodes are connected. Third is a Replication Network that is also isolated from outside networks and dedicated to replication traffic between Storage nodes. Public and Storage Networks are mandatory. Replication Network is optional and must be configured in the Ring. By default, all of the OpenStack Object Storage services, as well as the rsync daemon on the Storage nodes are configured to listen on their STORAGE_LOCAL_NET IP addresses. If Replication Network configured in the Ring, then Account, Container and Object servers listen on both STORAGE_LOCAL_NET and STORAGE_REPLICATION_NET IP addresses. Rsync daemon will only listen on STORAGE_REPLICATION_NET IP address in this case. Public Network (Publicly routable IP range): This network is utilized for providing Public IP accessibility to the API endpoints within the cloud infrastructure. Minimum size: 8 IPs (CIDR /29) Storage Network (RFC1918 IP Range, not publicly routable): This network is utilized for all inter-server communications within the Object Storage infrastructure. Recommended size: 255 IPs (CIDR /24) Replication Network (RFC1918 IP Range, not publicly routable): This network is utilized for replication-related communications between storage servers within the Object Storage infrastructure. Recommended size: 255 IPs (CIDR /24)