Auxiliary OperationOffline operation.ConnectorExit to or entry from another part of chart.Phase 3 Phase 2 foo.orgcdn.foo.orgads.foo.org...foo.org <IP>bar.org <IP>baz.org <IP>cdn.foo.org <IP>ads.foo.org <IP>... ...Sharedpreload cachePer-circuit cacheswithout any sharingCircuit ACircuit BCircuit CCircuit DDNShierarchy............Phase 1foo.orgcdn.foo.orgads.foo.org...foo.orgfoo.org...