how can i add two subnet on a single DNS zone for dns authentication of two subnet client computer

Your question requires clarification. Subnets and DNS are not interelated. DNS authentication? not sure what you are referring to. Can you elaborate as to the problem? Visit anITKB.com, an IT Knowledge Base. Follow me on Facebook.

Hello, your questions is not enough clear. There is no subnets that can be added to a direct zone. Only reverse zones can be created for your two subnets. For authentication, I think that here you are talking about secure update of DNS records. Here, you have to integrate your DNS zone in AD and then allow only secure updates. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator Microsoft Certified IT Professional: Server Administrator

Actually i have two subnet 10.x and 192.x and a single AD configured on 192.x integrated with DNS 10.x was a separate network now i want to integrate this network with 192.x, where client computer can be added to this domain. what is the best solution to achieve this. I don't know much about this so need some help

Their is no best solution. You can move your clients and change their IP addresses without problems. Just make sure that they are poiting to your DC / DNS server as primary DNS server. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator Microsoft Certified IT Professional: Server Administrator