The named.conf file is a collection of statements using nested options surrounded by opening and closing ellipse characters, { }. Administrators must be careful when editing named.conf to avoid syntactical errors as many seemingly minor errors will prevent the named service from starting.
The following is a list of valid comment tags used within named.conf:
// — When placed at the beginning of a line, that line is ignored by named.
# — When placed at the beginning of a line, that line is ignored by named.
/* and */ — When text is enclose in these tags, the block of text is ignored by named.