A. As you may be aware when you connect to a site the information you view is cached locally to speed up future visits to the site (the cache size can be set View - Internet Options - General - Temporary Internet files - Settings). Its actually possible to view the web using only the cache when not connected, obviously you can only view sites that are stored in the cache. To work off line:

  1. Start Internet Explorer
  2. From the file menu select Work Offline

You can then enter URL's and link as normal but will receive an error if you attempt to link to a site that is not cached. To stop working Offline just deselect "Work Offline"