Windows sysinternals

Chapter 2 Windows Core Concepts 31
Winlogon
Disconnect
Session
0
WinSta0
Services-0x0-3E4$
Services-0x0-3E5$
Services-0x0-3E7$
mswindowstation
Default
Default
Default
Default
MsrestrictedDesk
Session
1
WinSta0
Winlogon
Disconnect
Default
Session
2
WinSta0
Winlogon
Disconnect
Desktop1
Default
FIGURE 2-7 Relationship between sessions, window stations, and desktops.
Terminal Services Sessions
Terminal services support multiple interactive user sessions on a single computer. Introduced
in Windows NT 4.0 Terminal Server Edition, they were not incorporated into the Windows
client operating system family until Windows XP. Features they support include Fast User
Switching, Remote Desktop, Remote Assistance, Remote Applications Integrated Locally
(RAIL, a.k.a. RemoteApps), and virtual machine integration features. An important limitation
of Windows clients (Windows XP, Windows Vista, and Windows 7) is that only one interactive
session can be active at a time. That is, while processes can continue to run in multiple
disconnected sessions simultaneously, only one session can update a display device and
receive keyboard and mouse input. A further limitation is that a domain-joined Windows XP
computer supports at most only one interactive session. For example, if a user is logged on
at the console, you can log on to the computer via Remote Desktop using the same account
and continue that session, but you cannot log on with a different user account unless the first
user is logged off.
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