When I don't pick up the network, I can't see my computer to pick up my computer. After I can see everything is normal, I can see my computer, and after connecting the network cable, I only see someone else's computer before I can see my computer if others. I can't see my own computer and show that this workgroup server list cannot be used. Please ask you a master.
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Although the mechanism of online neighbors is simple, 3 words 2 words are not very clear.
Why is it clear that the machine has turned off, but still stayed in "online neighbors"? When can I disappear? Why is there any computer name to change, but the old name is left online?
To answer these questions, you have to start from Microsoft's browsing service ideas. In the NT domain environment or in the Working Group environment, browsing service maintains a browsing list, which contains all available domains, workgroups, and computer names, etc., is a directory of shared resources. When we use "online neighbors", we use this browsing service.
The browsing service system includes roles such as primary browsers, backup browsers, and browser customers. The computer that serves as a primary browser acts on the maintenance browsing list and periodically sends a copy to a computer as a backup browser. When the browser customer needs to know which available resources are available online, send an API call to the computer as a backup browser to get the current list.
The main domain controller (PDC) has the priority of the primary browser so that it undertakes the work of the browsing list of this working group where it is maintained. However, when it also has a shutdown or restart, the selection process of the primary browser is generated. That is, the campaign occurs when a computer cannot locate the primary browser, or when the computer has a more preferential condition, or when the NT primary domain controller is started. According to their respective election conditions, when the computer is used as a computer, the web browsing can be normal. The campaign is achieved by broadcasting, if which computer's campaign is better than the packet it receives, it will broadcast your campaign conditions, and receive someone else's campaign. Each computer is based on the role in the domain. After the delay is not equal, the reaction is reacted, which can reduce the computer that the campaign conditions are poorly transmitted. When a computer election becomes a primary browser and its browsing list is empty, it will broadcast a message requested notification. Forcing all the computer must be replied within 30 seconds, this 30 second time is to prevent server overload or The packet is lost.
In addition to the computer that is responsible for the primary browser and backup browser tasks, other machine will periodically publish notifications to the primary browser to inform you to be available resources. This time begins to be 1 minute, 2 minutes, 4 minutes, 8 minutes, and later it is once every 12 minutes. If this machine is turned off, the primary browser has been 3 consecutive cycles. It is not received for 36 minutes, which will be unavailable and remove it from the browsing list. However, it remains in the machine of the backup browser, the backup browser calls the master browser once every 15 minutes to obtain the updated network resource list, that is, the resources that are not available will wait until 36 15 = 51 minutes will not It disappeared online. That's why there is a computer changed, but the old name is still in the reason for a period of time.
There is a master browser in a working group, then in multiple working groups, multiple fields or even multiple subnets? This requires a domain master browser, the primary browser of each working group or domain to periodically send this domain master browser to this domain, which is 1 minute, 5 times, 15 minutes. If this message is not received within 3 cycles, the domain master browser also removes it from its own list. That is to say, when a working group is faded, it will remain in the primary list of 45 minutes. The domain master browser default is the primary domain controller, and the Windows XP Professional version of the computer cannot be responsible.
When receiving the browsing list, the computer must be able to resolve the NetBIOS name inside, which requires the network's WINS service or DNS service to be normal, browsing can be normal, because the browsing campaign is implemented through UDP broadcast. As a network administrator, when there is a problem with online neighbors, it is necessary to analyze it to see if it is temporary or the campaign process has a problem. There is currently no way to prove whether the browsing list is complete, but there is a way to find that a available resource is in the list, and even forced to start a campaign. Generally, along the path of the communication chain from the first host browser that should have the resource, see if it receives a note message for a computer.
The browsing service uses a computer browsing protocol in the CIFS / ET File System protocol group, using an active directory in the Windows 2000 computer environment, but in order to be compatible, Windows 2000 also supports this browsing service.
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Regarding the problem of online neighbors is very common, I don't think it is necessary to understand the working principle of online neighbors.
Tianji.com "Online Neighbors" topic:
Http://www.yesky.com/serverindex/77125243130347520/20031231/1758715.SHTML
