Additionally to statements, the /etc/named.conf file can also contain comments. Comments are ignored by the named service, but can prove useful when providing additional information to a user. The following are valid comment tags:
//-
Any text after the // characters to the end of the line is considered a comment. For example:
notify yes; // notify all secondary nameservers
#-
Any text after the # character to the end of the line is considered a comment. For example:
notify yes; # notify all secondary nameservers
/* and */-
Any block of text enclosed in /* and */ is considered a comment. For example:
notify yes; /* notify all secondary nameservers */
