| Several different Microsoft documents provide Browse Service timing information, much of which has already been presented. For the sake of clarity, the Browse Service timings are collected in the table below. These values may be verified against the Microsoft article Browsing and Windows 95 Networking as well as the Leach/Naik draft. | Browser Service timings | | Period | Operation | | 15 minutes | Backup Browser Sync . The Backup Browser performs a NetServerEnum2 operation with the Local Master Browser. | | 15 minutes | Local Master Browser Sync . The Domain Master Browser performs a NetServerEnum2 operation with a Local Master Browser when it receives a MasterAnnouncement from the LMB, and then repeats the sync every 15 minutes. | | 15 minutes | Domain Master Browser Sync . Local Master Browsers will contact their Domain Master Browser and perform a NetServerEnum2 operation to retrieve the merged Browse List. | | 1 minute, increasing to 12 | Host and Local Master Announcements . These announcements are sent one minute apart at first. The period typically increases in the following sequence: 1, 2, 4, 8, 12, 12, 12... | | 1 minute, increasing to 15 | Domain Announcements . Similar to the previous kind, except that they peg at 15 minutes instead of 12 and the series is reported to be: 1, 1, 1, 1, 1, 15, 15... | | 36 minutes | The timeout period for a Host entry to time out of the local Browse List. It should be 3 x the announcement period, but in testing, some Providers listed their Periodicity incorrectly. | | 45 minutes | The timeout period for a Domain entry to time out of a foreign workgroup's Browse List. | | 15/2 minutes | The average amount of time required before a Backup Browser discovers that its Local Master is missing, and calls another election. Elections may also be called if a Preferred Master shows up on the LAN or if a Consumer gets no response to a GetBackupListRequest . | If you like playing with numbers (and really, who doesn't) you can spend some time going through the mental exercise of figuring out how long it takes for Host and Domain entries to time out across subnets. ...or you could take a nice quiet walk in the forest. The forest sounds good. Yep. Forest.  |
