Group Policy slow link detection on windows server 2008

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In windows server 2003, Group Policy slow link detection uses the ICMP ping to detect the network bandwidth. Most of the VPN networks have the issue with this because the clients communicate through a Firewall with the domain controller

This was a big problem in windows server 2003 because it uses the ICMP ping to detect the network bandwidth, some of the VPN sites ICMP ping might be disabled in firewall or the MTU size would be less then the required limit and also ping will increase the network traffic, to overcome this problems Microsoft come up with solution called NLA (Network Location Awareness)

Network Location Awareness is a service on client computer, it provide necessary information about the network and GPO uses this to apply the policy settings, most important it’s not using ICMP ping and very efficient compare to earlier process in Windows 2003.