The following is the current list of boolean expressions that are
supported by the DHCP distribution.
.PP
-.B check \fIclass-name\fR
-.RS 0.25i
-.PP
-The check operator returns a true value if the packet being considered
-comes from a client that falls into the specified
-class.
-.I Class-name
-must be a string that corresponds to the name of a defined class.
-Classes are only supported in the DHCP server.
-.RE
-.PP
.I data-expression-1 \fB=\fI data-expression-2\fR
.RS 0.25i
.PP