HOTSPOT
Your network contains an Active Directory domain named corp.contoso.com. The domain contains a domain controller named DC1.
When you run ping dc1.corp.contoso.com, you receive the result as shown in the exhibit. (Click the Exhibit button.)

You need to ensure that DC1 can respond to the Ping command.
Which rule should you modify?
To answer, select the appropriate rule in the answer area.
Hot Area:

Answer:

Explanation:
http://social.technet.microsoft.com/wiki/contents/articles/16566.windows-active-directory-role-for-windowsservers.aspx