Which additional name suffix entry should you add from the Remote Access Setup wizard?

Your network contains an Active Directory domain named contoso.com. All domain controllers run Windows Server 2012 R2. The domain contains an Edge Server named Server1.

Server1 is configured as a DirectAccess server. Server1 has the following settings:

You run the Remote Access Setup wizard as shown in the following exhibit. (Click the Exhibit button.)

You need to ensure that client computers on the Internet can establish DirectAccess connections to Server1.

Which additional name suffix entry should you add from the Remote Access Setup wizard?
A . A Name Suffix value of dal.contoso.com and a blank DNS Server Address value
B . A Name Suffix value of Server1.contoso.com and a DNS Server Address value of 65.55.37.62
C . A Name Suffix value of dal.contoso.com and a DNS Server Address value of 65.55.37.62
D . A Name Suffix value of Server1.contoso.com and a blank DNS Server Address value

View Answer

Answer: A

Explanation:

Split-brain DNS is the use of the same DNS domain for both Internet and intranet resources. For example, the Contoso Corporation is using split brain DNS; contoso.com is the domain name for intranet resources and Internet resources. Internet users use http://www.contoso.com to access Contoso’s public Web site and Contoso employees on the Contoso intranet use http://www.contoso.com to access Contoso’s intranet Web site. A Contoso employee with their laptop that is not a DirectAccess client on the intranet that accesses http://www.contoso.com sees the intranet Contoso Web site. When they take their laptop to the local coffee shop and access that same URL, they will see the public Contoso Web site.

When a DirectAccess client is on the Internet, the Name Resolution Policy Table (NRPT) sends DNS name queries for intranet resources to intranet DNS servers. A typical NRPT for DirectAccess will have a rule for the namespace of the organization, such as contoso.com for the Contoso Corporation, with the Internet Protocol version 6 (IPv6) addresses of intranet DNS servers. With just this rule in the NRPT, when a user on a DirectAccess client on the Internet attempts to access the uniform resource locator (URL) for their Web site (such as http://www.contoso.com), they will see the intranet version. Because of this rule, they will never see the public version of this URL when they are on the Internet.

For split-brain DNS deployments, you must list the FQDNs that are duplicated on the Internet and intranet and decide which resources the DirectAccess client should reach, the intranet version or the public (Internet) version. For each name that corresponds to a resource for which you want DirectAccess clients to reach the public version, you must add the corresponding FQDN as an exemption rule to the NRPT for your DirectAccess clients. Name suffixes that do not have corresponding DNS servers are treated as exemptions.

References:

http://technet.microsoft.com/en-us/library/ee382323(v=ws.10).aspx