Netbios use or not?

Hi,  we are trying to eliminate use of NetBIOS in our customer DOMAINS. However, the wintel guys don't know if they use it.

After reading today I was under the impression if they use AD/DNS there is no need for NetBIOS?

If anyone can enlighten on this or have a good document that would be great - thanks.

Also I'm unclear as to what the below means: is-nbns-enabled" FALSE mean that it is off for both settings?

vserver               is-netbios-over-tcp-enabled           is-nbns-enabled

svm1                   true                                                            false                                              domain A

svm2                   false                                                           true                                               domain B