Your company has 10 offices.
The offices connect to the Internet by using a WAN link.
The offices connect to each other by using a VPN connection.
An Active Directory site exists for each office. You plan to deploy Exchange Server 2010. Each site will contain two Exchange Server 2010 servers.
You need to recommend the placement of domain controllers and global catalog servers to meet thefollowing requirements:
.Minimize the number of domain controllers
.Must be able to deliver e-mail messages between users of the same office, if a domain controller and a WAN link fail simultaneously
What should you recommend?()