Two level directory advantages

[farm gate]

Secondary domain binding level directory actually very simple.

In the DNS domain name management background domain name forward, set secondary domain name forward to your target level directory.
After it has been submitted, in host record list will add a you just submit secondary domain name, the point to IP address and the main domain name is different. For example, information about the point is: 124.42.122.46. This is correct.
No matter you use virtual host, or independent server. As long as the main domain name can be normal visit can, do not need to be in virtual host or independent server setup secondary domain name again. (DNS in setting up the can through the secondary domain visited)