You install the Web Server (IIS) server role on a server that runs Windows Server 2008 R2.
Your company’s default Web site has an IP address of 10.10.0.1.
You add a Web site named HelpDesk.
The HelpDesk Web site cannot be started.
You need to configure the HelpDesk Web site so that it can be started.

What should you do?

A.
Run the iisreset /enable command on the server.

B.
Configure the HelpDesk Web site to use a host header.

C.
Run the appcmd add site /name: HelpDesk /id:2 /physicalPath: c:HelpDesk /binding:http/*:80:HelpDesk command on the server.

D.
Run the set-location -literalpath “d:HelpDesk_content” HelpDesk ID:2 location port:80 domain:HelpDesk command in the Microsoft Windows PowerShell tool on the server.

Explanation:
Configure a Host Header for a Web Site (IIS 7)

Host headers (also known as domain names or host names) let you assign more than one site to a single IP address on a Web server.

To configure a host header for a site
1. Open IIS Manager. For information about opening IIS Manager, see Open IIS Manager (IIS 7).
2. In the Connections pane, expand the Sites node in the tree, and then select the site for which you want to configure a host header.
3. In the Actions pane, click Bindings.
4. In the Site Bindings dialog box, select the binding for which you want to add a host header and then click Edit or click Add to add a new binding with a host header.
5. In the Host name box, type a host header for the site, such as www.contoso.com.
6. Click OK.
7. To add an additional host header, create a new binding with the same IP address and port, and the new host header. Repeat for each host header that you want to use this IP address and port.

Source: http://technet.microsoft.com/en-us/library/cc753195(WS.10).aspx