Do windows XP support multiple concurrent remote desktop sessions?
Do you mean 'multiple remote RDP sessions'? Nope. But some kind of 'hack' exists. It allows multiple RDP connections to XP box like Windows server terminal services, but cause violation of licence and so on...
No - if you require a machine which can handle multiple remote RDP connections you need to purchase a server Operating System combined with Terminal services with the correct ammount of licenses for users. Any attempt to hack/slash your Windows XP machine is not recomended for obvious reasons, not to mention as Sergey said you will have violated your License agreement with Microsoft.
Yes, why not.
BTW, What do you mean under "remote login sessions" - opening remote desktop session? interactive logins?
When someone maps a drive latter for remote network shared resource and accesses it remotely, it also opens remote session per each user
I answered correctly as as far as the question was formulated and further clarified by the questioner.
It is not guessing game. There is absolutely no point in answering something what had never been formulated or asked
Come on! I need just one more vote to hit negative maximum amongst answers
Update3 (Answers to answers and comments):
shows on my Windows XP Pro SP3 (without any cracking, editing registry) 58 inbound remote sessions from 8 computers (ip-addresses) and just one utorrent shows more than 964 connections.
There is well-known 10-connections limit for Windows XP. Take your time to read the basics before teaching others.
This is just ridiculous:
Even if to speak about interactive remote logins, should it be understood that applications like VNC Server/Viewer, TeamViewer, etc., or even MS SQL Server Developer, etc, or built-in MS IIS5, Server Service are illegal to run in Windows XP Pro?
Note: at the time of all answers the original question did not mention any RDP
For convenience of downvoting I shifted this discussion to Which Windows remote connections bypass LSA? and what r definitions of login vs. logon session?
Please come to downvote there also!
@whatever-downvoted-my-answer, be it bot or human,
May I ask why my questions were downvoted? Uncommented / unexplained, i.e. unreasonable, downvotes disservice and discredit the community of serverfault.com
My related question: