With the growth of networks comes the challenge of managing computing resources that are physically distant from each other. In the 1960s, the IT organization only needed to worry about its "glass house"the room where its giant mainframe was protected. Today, you must provide extensive remote-user access. You can connect your system to the public telephone network, rent leased lines to remote departments or offices, even connect to the Internet. Your employees want to work from their homes, or from wherever their jobs take themto another building, city, province, or country. You must somehow manage these users also.