Abstract: A closed browser for navigating the world-wide web includes a tabular listing of destination addresses, such as uniform resource location codes (URL). Thus, the destination addresses can correspond to open links on the Internet, closed links on the Internet, and may also correspond to one or more local area networks (LANs)/intranets, and indeed to particular directories or files on the LAN or single user hard drive. A user may select a destination address only from the tabular listing, and may not directly input a URL that is not contained in the listing. A closed site determiner utility is also provided for determining whether a link is open or closed, based on user-defined criteria.