This is a good question. quoted from
http://www.howtonetworking.com/casestudy/ad1.htm
Case Study - Client authentication goes across the WAN
Situation: There are two offices located in different cities connecting with T1 line. There is a Windows Server 2003 DC in each office. However, the authenticate of most clients at the branch office goes to the main office site instead of the local site.
Cause: If they do not have AD Sites implemented, the client authentication will go across the WAN. Sites are designed for logon traffic and replication traffic control. If they were to implement Sites, the clients would always check for the DC/GC in their own site first.
Resolution: 1. Create multiple sites to optimize both server-to-server and client-to-server traffic over WAN links. In the Windows 2000/2003 operating system, inter-site replication automatically minimizes bandwidth consumption between sites.
2. Place at least one domain controller in every site, and make at least one domain controller in each site a global catalog.
3. To provide high performance, availability, and flexibility in distributed environments, use AD multi-master replication. With the multi-master replication, the fully synchronized directory replicas can give users faster performance because they can locate resources using the local directory service rather than by traversing the WAN
Related Topics
Active Directory How to
Active Directory Overview
AD Operations Overview
Troubleshooting AD
Bob Lin, MS-MVP, MCSE & CNE
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.
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On a windows XP computer, how can I find out which server is authenticated
from (logon server).
Also, is there a way to have computers go to a specific server to logon?