NetBIOS names are required for establishing networking services in earlier version of Microsoft windows operating system. NetBIOS over TCP/IP provides three methods to resolve computer names to IP addresses: broadcast , the LMHOSTS file and WINS. The default technique used is name resolution by broadcast. For Network configuration that include routers and WAN links, an LMLHOSTS file is used to supplement the broadcast method.
Although NetBIOS and NetBIOS names can be used with network protocols other than TCp/Ip. WINS was designed specifically for providing support to NetBt. WINS is required when users access resources that have NetBIOS names . IF you do not use WINS in such networks, you will not be able to connect to a remote network resource by using its NetBIOS name unless you use Lmhosts files and you might be unable to establish file and print sharing conncections.
WINS maps the Netbios names to IP addresses. It was developed to solve the problem that occured when NetBIOS name resolution was used. The WINS database is updated automatically when any dynamic address configuration changes occur. This is because WINS registrations are done automatically each time the client starts and joins the network. The user or the network administrator does not have to change any settings manually.
WINS has the following advatages over the NetBIOS name resoltion techniques:
1) Reduces the NetBIOS name query broadcast traffic because client query a WINS server directly instead of broadcasting their queries.
2) Supports NetBIOS name registration and resolution in an enviornment where DHCP enable clients are configured for Dynamic TCP/IP address resolution.
3) Supports a central Management and duplicates name- to- address mappings to other servers running WINS.
4) Works with DNs in the same enviornment allowing combined name searches in both the namespaces.
Consider two computers, computer 1 and computer 2, both having windows server 2003 installed on them. YOu can use the Network monitor tool to capture the traffic between these two computers.
To create a network capture of a name resoltion:
1. Log on to computer 1 as administrator.
2. Select Start-> Run.
3. Enter Cmd in the open text box.
4. Click Ok. The command prompt window appears.
5. Type ipconfig/flushdns and press Enter.
6. Type nbstart-R and press Enter.
7. Select start-. All programs-> Administrative tools-> Network Monitor.
8. CLick OK.
9. Enter LOcal computer and select Local Area Connection.
10. Click Ok.
11. Select capture -> start to start a new capture.
12. Switch back to the command prompt, type ping computer 2 and press Enter.
13. After you receive four replies from computer 2, switch back to Network Monitor.
15. Select Capture -> Stop and view to stop and view the capture.
16. Look at the protocols listed in the new network capture.
17. Selct File->s ave as .
18. Enter Name resolution 1 in the file name text box.
19. Click the save button.
20. Exit Network monitor and close the command prompt window.
21. Log off computer 1.
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