Event Details
Operating System->Microsoft Windows->Built-in logs->Windows 2000-2003->Security Log->Logon/Logoff->EventID 540 - Successful Network Logon [Win 2000]
EventID 540 - Successful Network Logon [Win 2000]
Indicates that a logon session was successfully created for the user logging in remotely to access a network resource (e.g. a file share).

Note:
The message contains the Logon ID, a number that is generated when a user logs on to a computer. The Logon ID is unique to that logon session until the computer is restarted, at which point the Logon ID may be reused. The Logon ID can be used to correlate a logon message with other messages, such as object access messages.
For logons that use Kerberos, the logon GUID can be used to associate a logon event on this computer with an account logon event on an authenticating computer, such as a domain controller.
This event is logged whenever a user logs on either with its local SAM account or a domain account.
This message also includes a logon type code. The logon type code indicates the manner in which the user logged on. 

For explanation of the values of some fields please refer to the corresponding links below:

Find more information about this event on ultimatewindowssecurity.com.

Corresponding events on other OS versions:

Windows XP
 Windows 2003
 Windows 2008


Related events:

For other logon types see the following event:
 Sample: 
        Event Type:     Success Audit
        Event Source:   Security
        Event Category: Logon/Logoff
        Event ID:       540
        Date:           11/13/2009
        Time:           11:32:54
        User:           NT AUTHORITY\SYSTEM
        Computer:       DCCC1
        Description:
        Successful Network Logon:
        User Name:	DCCC1$
        Domain:		LOGISTICS
        Logon ID:		(0x0,0x414989)
        Logon Type:	3
        Logon Process:	Kerberos
        Authentication Package:	Kerberos
        Workstation Name:
Log Type: Windows Event Log
 Uniquely Identified By:
Log Name: Security
Filtering Field Equals to Value
OSVersion Windows 2000
Source Security
Category Logon/Logoff
EventId 540
Field Matching
FieldDescriptionStored inSample Value
DateTime Date/Time of event origination in GMT format. DateTime 10.10.2000 19:00:00
Source Name of an Application or System Service originating the event. Source Security
Type Warning, Information, Error, Success, Failure, etc. Type Success
User Domain\Account name of user/service/computer initiating event. User RESEARCH\Alebovsky
Computer Name of server workstation where event was logged. Computer DC1
EventID Numerical ID of event. Unique within one Event Source. EventId 576
Description The entire unparsed event message. Description Special privileges assigned to new logon.
Log Name The name of the event log (e.g. Application, Security, System, etc.) LogName Security
Category A name for a subclass of events within the same Event Source. Category Logon/Logoff
Domain Domain of the account for which logon is requested. InsertionString2 RESEARCH
User Name Account name of the user logging in InsertionString1 DCCC1$
Logon ID ID of the logon session of the successfully logged in user. Useful for tracking other user activity within the same logon session. InsertionString3 (0x0,0x414989)
Logon Type Interactive, Network, Batch, etc. Please find the code descriptions here. InsertionString4 3
Logon Process The program executable that processed the logon. Please find full logon processes list here. InsertionString5 Kerberos
Authentication Package The name of the authentication package (method) used to check user credentials (e.g. NTLM or Kerberos). Please find full authentication packages list here. InsertionString6 Kerberos
Workstation Name The NetBIOS name of the remote computer that originated the logon request InsertionString7
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