Overview of Time Domain

The time domain is the set of the time segments. One time domain can contain zero to multiple time segments. The time range of the time domain is the union of the time segments.

The time segment has the following two kinds:

• Periodical time segment: Periodical time segment means to select one day or several days from Monday to Sunday, and the start time point to the end time point as the time segment, taking effect every week repeatedly.
• Absolute time segment: The absolute time segment means to take effect within the specified date and time range

The user usually has the following demands:

The PC of one network segment can access the server only in the work time of the work day (except for all holidays); in the afternoon of Saturday, permit all PCs to communicate with the external Internet.

The communication control demands based on the time can be met by binding time domain in the ACL or ACL rule.