Vpn meaning

Virtual private network.
abbreviation
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(Virtual Private Network) A private network configured within a public network such as the Internet or a carrier's network. A VPN provides anonymity and privacy for every desktop and mobile device that accesses the Internet. VPNs use so-called "tunneling" protocols because they tunnel a private channel through a public network (see VPN protocols).AnonymityVPNs provide a server that sits between the user and the destination website, which only sees the IP address of the VPN and not the user (see illustration below). See VPN service, anonymous Web surfing and proxy server.PrivacyA VPN encrypts the user's data because unencrypted traffic can be read by an attacker, especially in a public Wi-Fi hotspot. Another common encryption method is TLS, which every e-commerce and financial website employs for data transfer. However, TLS does not provide anonymity (see illustration below). See TLS.Carrier VPNsCarriers offer a variety of "virtual private routed networks" (VPRNs) that can connect customer's Ethernet frames or IP packets (see VPLS and MPLS).VPN HistoryYears ago, the telephone carriers used their vast backbones to tunnel traffic between cities, giving the appearance of a private network that was more affordable than long distance private lines. Prior to the Internet, VPNs were built over several network architectures (see X.25, Switched 56, ATM and frame relay).
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Also known as SDN (Software-Defined Network).A voice network service that creates the effect of a private, leased line network, but without the associated issues of design complexity, long deployment time, high recurring cost, and vulnerability to failure. Rather than interconnecting the various sites with dedicated circuits, the carrier routes the traffic through the public switched telephone network (PSTN) facilities on a priority basis over pre-determined paths, thereby ensuring that the level of service provided is roughly equivalent to that of a true private network.VPN services generally are interexchange, and often international, in nature, as they find their greatest application in very large multisite, national, or multinational enterprises.
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Also known as SDN (Software-Defined Network) and SDDN (SoftwareDefined Data Network).A digital data network service that operates much like a voice VPN or Switched 56, although the level of bandwidth provided can be much greater in support of intensive data communications, videoconferencing, or multimedia conferencing. Such a VPN creates the effect of a private, leased-line network, but without the associated issues such as design complexity and lengthy deployment. Rather than interconnecting the various sites with dedicated circuits, the carrier routes the traffic through the public switched telephone network (PSTN) facilities on a priority basis over pre-determined paths that are digital from end to end, thereby ensuring that the level of service provided is roughly equivalent to that of a true private data network. VPN services generally are interexchange, and often international, in nature, as they find their greatest application in very large multisite, national or multinational enterprises. Depending on the carrier, VPNs support bandwidth of 56/64 kbps, N.
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