Virtual private networks (VPNs) utilize major advancements in technology to establish secure private communication channels, for the transfer of data, over shared networks such as private intranets or the internet. Currently, the most popular and state-of–the-art virtual private networks are based on MPLS (multiprotocol label switching). MPLS provides any-to-any connectivity over T1 or higher bandwidth. The best MPLS networks are facilitated within the closed systems of specific tier 1 providers. With this scenario, MPLS networks are as secure as point-to-point private lines. With quality of service (QoS), MPLS networks are extremely well suited for transmitting voice, priority files, multiple location audio or video conferencing, or high quality video transmission. For two location networks, a point-to-point private line continues a bit less expensive than a MPLS virtual private network, if the two locations are within a few hundred miles apart. However, point-to-point lines are not normally managed by providers, so with point-to-point circuits, obtaining customer premise equipment, and configuring and maintaining the equipment is the responsibility of the end user. MPLS networks on the other hand are provided with all needed hardware, installation, configuration and management of the network by the provider for about the same cost, or just slightly more, per location, than managed internet service. For multiple location networks, or two location networks which you know will increase in number of locations, MPLS can be far more functional, and far less expensive than a network comprised of point-to-point lines. MPLS networks are far more versatile than point to point circuits, in that with MPLS each location of the network can use fractional t1, full t1, bonded T1, ethernet, fractional DS3, full DS3 or OC3, depending on the specific bandwidth need of that location. Also, some providers are not able to provide MPLS over DSL, for smaller locations. Point to point circuits in contrast, can only utilize full T1, ethernet, full T3 or OC 3. Managed MPLS networks are pretty much turn key for the end user. There are also a variety of options for networking DSL or Cable service as well.