If it's a contact list, then the root node should be.
如果这是一个联系人清单，那么根节点应该是。
2
Subsequent requests are treated similarly: the clients always contact the central coordinator node, and the coordinator node retrieves the data from the correct node.
后续请求也被同等对待：客户端总是联系中心协调者节点，而协调者节点会从正确的节点检索数据。
3
Fill in the node name, password, and contact information; then press the Finish button.