This specifies the IP address-list of Net BIOS name-servers that are
available to DHCP clients
(each IP address in this list is
separated by comma and the list is terminated by semi-colon),
an example would be 10.10.1.1,192.168.36.1,157.227.44.1;(no spaces in between).User should enter a 'null' or 'NULL' string to remove current Net BIOS name-server list.