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Như thể hiện trong hình 11,11, tab WINS cho phép bạn thêm các địa chỉ của các máy chủ WINS. Bạn cũng có thể cho phép LMHOSTS tra cứu và nhập khẩu một tập tin LMHOSTS hiện có. Lưu ý, theo mặc định, hệ thống sẽ nhận được một thiết lập NetBIOS từ máy chủ DHCP, | NetBIOS Name Resolution 209 FIGURE Configuring WINS in Windows Vista. As shown in Figure the WINS tab lets you manually add the addresses of WINS servers. You can also enable LMHosts lookup and import an existing LMHosts file. Note that by default the system receives a NetBIOS setting from the DHCP server but you can also elect to override the DHCP setting by enabling or disabling NetBIOS over TCP IP. When a WINS client computer boots after being configured to use WINS the following process occurs 1. Service startup As the computer boots various services are started some of which need to be made known to other computers. 2. Registration request To be known to other computers on the network the service must register. A WINS client computer packages the NetBIOS name and the computer s IP address inside a name registration request and the registration request is sent to the WINS server. Upon receiving the registration request WINS checks its database to see whether the name is already registered. If the name does not exist WINS adds the NetBIOS name and IP address pair to its database and sends a name registration response indicating the name was successfully registered. If the requested NetBIOS name already exists in From the Library of Athicom Parinayakosol 210 I HOUR 11 Name Resolution the WINS database WINS challenges the computer currently registered by sending a message to the registered IP address. If the currently registered computer responds a negative acknowledgment is sent to the computer attempting to register the name. If the computer being challenged doesn t respond WINS allows the registration to occur and overwrites the previous registration. 3. Lease Assuming the computer is successful in registering its NetBIOS names and services with WINS these names are considered leased. In essence the computer is allowed to use the NetBIOS name for a specified period of time for instance six days but the client can renew the lease before it expires. .