VPN connections allow users working at home or on the road to connect in a secure fashion to a____________(71)corporate server using the routing infrastructure provided by a public intemetwork(such as the Internet)．From the user’S perspective，the VPN connection is a point-to-point connection between the user’S computer and a corporate__________(72)．The nature of the__________(73)internetwork is irrelevant to the user because it appears as if the data is being sent over a dedicated__________(74)link．VPN technology also allows a corporation to connect to branch offices or to other companies over a public internetwork，while maintaining secure___________(75)．The VPN connection across the Internet logically operates as a wide area network link between the sites． (75)