[Samba] DNS backend

[Felipe_G0NZÁLEZ_SANTIAG0]

Hello. 
which are the main differences between Samba_Internal and BIND9_DLZ ? 
I refer to the differences about functionality such as zone transfers and automatic updates. 
Which others functionalities offers BIND9, that Samba_Internal doesn't support ? 

Is it possible to use a DNS Server (Bind9) separate of the DC Samba4? I mean, in other server. 

Thanks for reply, 
FelipeGS6 .