Your network contains a single Active Directory domain. 
You have an Exchange Server 2010 organization that contains a Hub Transport server named Hub1. Hub1 receives all e-mail messages that are sent to your organization from the Internet. 
A new company security policy states that domain-joined servers must not be accessible directly from theInternet. 
You need to create a message hygiene solution to meet the following requirements：
.Comply with the new security policy
.Minimize the amount of spam that is delivered to the internal Exchange servers in the organization 
What should you do first？（）

Your network contains an internal network and a perimeter network. The internal network contains an Active Directory forest. The forest contains a single domain. 
You plan to deploy 10 Edge Transport servers on the perimeter network. 
You need to recommend a solution for the Edge Transport server deployment. The solution must meet the following requirements：
.Allow administrators to apply a single security policy to all Edge Transport servers
.Reduce the administrative overhead that is required to manage servers
.Minimize the attack surface of the internal network
What should you recommend？（）