You have an Exchange Server 2010 Service Pack 1 (SP1) organization. The network contains two
Active Directory sites named Site1 and Site2. Site1 contains an Edge Transport server named
Server1. Each site has a direct connection to the Internet. Server1 receives all of the email sent to
the Exchange organization from the Internet. You need to recommend a solution that meets the
following requirements:
• Prevents an email message from being returned to the sender if Server1 fails.
• Prevents an email message from being returned to the sender if the connection to the Internet in
Site1 fails.
What should you include in the recommendation? (Each correct answer presents a complete
solution. Choose all that apply.)

A.
Deploy a new Edge Transport server named Server2 to Site2. Create a Network Load Balancing
cluster that contains Server1 and Server2. Create a mail exchange (MX) record for the cluster.

B.
Deploy a new Edge Transport server named Server2 to Site2. Create a failover cluster that
contains Server1 and Server2. Create a mail exchange (MX) record for the cluster.

C.
Create a mail exchange (MX) record that points to an Exchange Hosted Service. Configure the
Exchange Hosted Service to accept email messages for your SMTP domain.

D.
Deploy a new Edge Transport server named Server2 to Site2. Create a mail exchange (MX) record
for Server2.

Explanation:
This question had both c and d as the answers however I disagree with that. From what I can see
there is no Exchange Host Service . The only way to meet the requirements of the question you will
need to deploy a second edge server in site 2 and create the MX record. As both sites have a direct
link to the Internet each Edge Server will load balance across the 2 servers