Viewerframe+mode |work| -

The term originates from the native directory structure and URL routing configuration of legacy networked hardware—most notably manufactured by and similar IP camera vendors.

: Many legacy IP cameras shipped with no password or a universal default (e.g., admin/admin). System installers frequently plugged the cameras into networks without changing these parameters. viewerframe+mode

Are you trying to view the camera or over the internet ? The term originates from the native directory structure