VPNs cannot make online connections completely anonymous, but they can increase privacy and security.
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. Despite this, 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 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 who need access to private resources, 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: 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 dedicated circuits or with tunneling protocols over existing networks. Encryption is common, although not an inherent part of a VPN connection. It provides access to resources that are inaccessible on the public network and is typically used for remote workers. The benefits of a VPN include increases in functionality, security, and management of the private network.
JSTOR ( May 2021) ( Learn how and when to remove this template message)Ī virtual private network ( VPN) extends a private network across a public network and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. 
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