the OSI layer they present to the connecting network, such as Layer 2 circuits or Layer 3 network connectivity.the type of topology of connections, such as site-to-site or network-to-network.the tunnel's termination point location, e.g., on the customer edge or network-provider edge.the tunneling protocol used to tunnel the traffic.However these technologies are not mutually exclusive and, in a significantly complex business network, may be combined to enable remote access to resources located at any given site, such as an ordering system that resides in a data center. Typically, individuals interact with remote access VPNs, whereas businesses tend to make use of site-to-site connections for business-to-business, cloud computing, and branch office scenarios. An intranet site-to-site VPN describes a configuration where the sites connected by the VPN belong to the same organization, whereas an extranet site-to-site VPN joins sites belonging to multiple organizations. Extranet-based site-to-site In the context of site-to-site configurations, the terms intranet and extranet are used to describe two different use cases. The interconnecting link may run over a dissimilar intermediate network, such as two IPv6 networks connected over an IPv4 network. This configuration expands a network across geographically disparate offices, or connects a group of offices to a data center installation. Site-to-site A site-to-site configuration connects two networks. This may be employed for remote workers, or to enable a mobile worker to access important tools without exposing them to the public Internet. This type provides access to an enterprise network, such as an intranet. Remote access A host-to-network configuration is analogous to connecting a computer to a local area network. Virtual private networks may be classified into several categories: Types VPN classification tree based on the topology first, then on the technology used VPN connectivity overview, showing intranet site-to-site and remote-work configurations used together From a user perspective, the resources available within the private network can be accessed remotely. A VPN available from the public Internet can provide some of the benefits of a wide area network (WAN). Ī VPN is created by establishing a virtual point-to-point connection through the use of tunneling protocols over existing networks. Encryption is common, although not an inherent part of a VPN connection. VPNs are also used to bypass internet censorship. The benefits of a VPN include security, reduced costs for dedicated communication lines, and greater flexibility for remote workers. Ī VPN can extend a private network (one that disallows or restricts public access), in such a way that it enables users of that network to send and receive data across public networks as if the public networks' devices were directly connected to the private network. ( Learn how and when to remove this template message)Ī virtual private network ( VPN) is a mechanism for creating a secure connection between a computing device and a computer network, or between two networks, using an insecure communication medium such as the public Internet. ( March 2023) ( Learn how and when to remove this template message) Please help improve it to make it understandable to non-experts, without removing the technical details. This article may be too technical for most readers to understand.

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