HOTSPOT
A company uses Windows Server 2008 R2 Domain Name System (DNS). You are
configuring Remote Desktop (RD) Connection Broker load balancing. You add the
necessary DNS entries for each RD Session Host server.
RD Connection Broker load balancing is not working.
You need to ensure that the Remote Desktop sessions are load-balanced across the RD
Session Host server farm. Which server option should you use? (To answer, select the
appropriate setting or settings in the answer area.)
Answer: 
Explanation:
Select “Enable round robin”.
To load balance sessions in an RD Session Host server farm, you can use the RD
Connection Broker Load Balancing feature together with Domain Name System (DNS) round
robin. To configure DNS, you must create a DNS host resource record for each RD Session
Host server in the farm that maps the RD Session Host server’s IP address to the RD
Session Host server farm name in DNS. The following procedure provides the steps to
configure DNS on a Windows Server 2008 R2- based domain controller. You must be a
member of the Domain Admins, Enterprise Admins, or the DnsAdmins group to complete
this procedure. To add DNS entries for each RD Session Host server in the farm Open the
DNS snap-in. To open the DNS snap-in, log on to a computer where the DNS snap-in has
been installed, click Start, point to Administrative Tools, and then click DNS. Expand the
server name, expand Forward Lookup Zones, and then expand the domain name. Rightclick the appropriate zone, and then click New Host (A or AAAA). In the Name (uses parent
domain name if blank) box, type the RD Session Host server farm name. The farm name is
the virtual name that clients will use to connect to the RD Session Host server farm. Do not
use the name of an existing server. For management purposes, we recommend that you use
the same farm name that you specified when you configured the RD Session Host servers to
join a farm in RD Connection Broker. In the IP address box, type the IP address of an RD
Session Host server in the farm. Click Add Host. Repeat steps three through six for each RDSession Host server in the farm. Important You must specify the same farm name in the
Name (uses parent domain name if blank) box for each DNS entry. For example, if you have
three RD Session Host servers in a farm named FARM1, with IP addresses of 192.168.1.20,
192.168.1.21, and 192.168.1.22, the entries would look similar to the following:
Copy
Farm1 Host(A) 192.168.1.20
Farm1 Host(A) 192.168.1.21
Farm1 Host(A) 192.168.1.22
When you are finished, click Done.
Note
By default, DNS round robin is enabled when using DNS on a
Windows Server 2008 R2-based domain controller. The Enable round robin setting is
available on the Advanced tab when you view the properties of the server in DNS.
http://technet.microsoft.com/en-us/library/cc772506.aspx