JMS can also work but you will just have some restrictions.
DNS with record A mean Address IP. CName mean alias. In both cases if the result is identical (same IP address) then this is OK to have the alias.

If all the domain are assigned to the same document root (as it seems the case), this just mean that you don't have to fill the JMS deploy directory.
In this case it will more difficult to have specific images folders, templates folders, .... as all the website will use the same root directory.
In fact you will work like on Windows platform that does not allow the Symbolic Links.

Hi edwin;

Here it is a basic slave site creation on unix with symbolic link allowed.
Site ID = slave1
Domain = {site_url}/multisites/{site_id}
Deploy direction = {site_dir}

But how about the symbolik link is forbidden..

please help me.

As you could see in the tutorial video 0.b slide 11, DNS server and HTTP Server are different things.
You mentioned that you have the DNS server defined with a A record (that mean contain an IP address) and not a CNAME (that means is not defined as a synonym or an alias).

This just mean that you have the IP address assigned to the domain name.
This still does not specify the "document root" or the location on the disk where the domain is assigned. This is done with your HTTP server adminsitration tool.

So DNS server does not seems the problem as you reach a machine with the correct IP address.