VPNs offer companies a means to interconnect branch and remote offices to the information technology resources at the main office, and to keep telecommuters and business travelers in touch and productive, whereever they may be. An IP VPN service offers the security and policy management capabilities of a network built from leased lines, but over a shared, lower-cost environment. Some are based on the public Internet, while other service provider offerings make use of private IP network facilities.
Network resources provided to users, on demand, by public carriers such that the users view this partition of the network as a private network.
Networks that are essentially private, but use the Internet in lieu of expensive leased phone lines between offices.
or "VPNs" used by multi-site corporations which make extensive use of telecommunication services between sites, VPNs consist predominantly of: (i) lines over the ordinary public switched telephone network where capacity demands are low; (ii) dedicated leased lines which the PTO operator can partition through the use of intelligent switches, where capacity demands are high; and (iii) pre-configured data paths over a data network.
VPNs are services using public network facilities augmented by network control point and service management system facilities wherein traffic is routed through the public network under computer control in a manner that makes VPN service indistinguishable from dedicated facilities based private networks. Customers can define, change and control network resources with the same or more flexibility as afforded by facilities based private networks.
Networks that use encryption software to create secure "tunnels" through the public Internet.
VPNs are services that use public network facilities that are augmented by network control points and also service management system facilities. Within this, traffic is routed through public networks constantly under computer control. This is done in a manner that makes VPN service indistinguishable from other dedicated facilities that are based on private networks. Customers have the ablility to define, control and change control network resources. This can be done with the same or even more flexibility as is afforded by the facilities based on private networks.
A business service provided by many telecom carriers, VPNs provide corporations with secure, dedicated connections between their facilities, using the public networks. This saves companies the expense of purchasing or leasing their own private lines.