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The Deep description on Windows Services

We have tried our best efforts to explore the deepth of windows services and all the given information is gathered from Microsoft notes (As its microsoft product)


18. Service Name:-Trkwrks
Executable Name:-svchost.exe -k netsvcs
Log On As:-LocalSystem
Description:-:Maintains links between the NTFS file system files within a computer or across computers in a network domain. The DLT Client service ensures that shortcuts and OLE (Object Linking and Embedding) links continue to work after the target file is renamed or moved. When a shortcut to a file on an NTFS v5 volume is created, distributed link tracking stamps a unique object identifier (ID) into the target file, known as the link source. Information about the object ID is also stored within the referring file, known as the link client.
Distributed link tracking can use this object ID to locate the link source file in any combination of the following scenarios that occur within a Windows domain:
  • The link source file is renamed.
  • The link source file is moved to another folder on the same volume or to a different volume on the same computer.
  • The link source file is moved from one NTFS volume to another within the same domain. (The NTFS volumes must be on computers running Windows 2000 or later. The NTFS volumes cannot be on removable media.)
  • The computer containing the link source file is renamed.
  • The shared network folder containing the link source file is renamed.
  • The volume containing the link source file is moved to another computer within the same domain.
Distributed link tracking also attempts to maintain links even when they do not occur within a domain, such as cross-domain, within a workgroup, or on a single computer that is not connected to a network. Links can always be maintained in these scenarios when a link source is moved within a computer, or when the network shared folder on the link source computer is changed. Typically, links can be maintained when the link source is moved to another computer, though this form of tracking is less reliable over time.
  • The DLT Client service runs on all Windows 2000-based or later computers. In non-networked computers, the DLT Client service performs all activities related to link tracking.
  • The DLT Server service runs on Windows 2000 Server or later domain controllers. The service maintains information relating to the movement of link source files. Because of this service and the information it maintains, links within a domain are more reliable than those outside a domain. For computers that run in a domain, the DLT Client service takes advantage of this information by communicating with the DLT Server service.
Note:-The DLT Client service monitors activity on NTFS volumes and stores maintenance information in a file called Tracking.log, which is located in a hidden folder called System Volume Information at the root of each volume. This folder is protected by permissions that allow only the system to have access to it. The folder is also used by other Windows services, such as Indexing Service.
If the DLT Client service is disabled, you won't be able to track links. Likewise, users on other computers won't be able to track links for documents on your computer.
Avaliable on OS:-Windows XP Home, Windows XP Professional; Windows Server 2003, Standard Edition; Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition and Windows Server 2003, Web Edition.
Installed through:-Default operating system installation
Startup type:-Automatic
Service status:-Started
This service depends on the following system components:-Remote Procedure Call
The following system components depend on this service:- None
Port Numbers used:-None

19. Service Name:-TrkSrv
Executable Name:-svchost.exe -k netsvcs
Log On As:-LocalSystem
Description:-The distributed link tracking server runs on each domain controller in a domain. The service accepts notifications of file and volume moves from the tracking service on a computer and allows the distributed link tracking client to query a link source's current location. This server service maintains information in the DC about volumes and files which have been moved. The information on moves cannot grow above a certain size and it is automatically removed if it becomes unnecessary.
The distributed link-tracking services are available only on NTFS, and are only available for link sources on NTFS 5.0 and later volumes. Thus if a link source is moved to a FAT volume, or if a link source is moved to a computer running Windows NT 4.0, the tracking information is lost. Additionally, if a link source is moved even between NTFS 5.0 volumes, but the computer performing the move is running an earlier version of Windows NT or Windows 95/98/Me, the link tracking information is lost. When the link tracking information is lost, no harm is done to the link-source file itself, it is simply not trackable by the distributed link-tracking services.
Links to files on removable media are not maintained. Also, the tracking service does not recognize a new NTFS volume until the system is rebooted. A new volume might become available because of repartitioning, reformatting a FAT volume to NTFS, or connecting a new external drive. The service accepts notifications of file and volume moves from the tracking service on a computer and allows the distributed link tracking client to query a link source's current location. If the DLT server service is stopped or disabled, links maintained by the DLT Client service will be unreliable. The "NtfsDisableDomainLinkTracking" policy should be enabled in the File system policy group to prevent DLT clients from repeatedly trying to reach the disabled service.
Avaliable on OS:-Windows Server 2003, Standard Edition; Windows Server 2003, Enterprise Edition; Windows Server 2003, Datacenter Edition and Windows Server 2003, Web Edition.
Installed through:-Default operating system installation
Startup type:-Disabled
Service status:-Stopped
This service depends on the following system components:-Remote Procedure Call
The following system components depend on this service:- None
Port Numbers used:-None