A virtual private network (VPN) connects users' computers to a private network across a PUBLIC network, allowing them to send and receive data as if they were physically connected to the private network. USING a VPN gives you more capability, security, and control over your private network. Telecommuting professionals typically use it to acquire access to resources that aren't available on the public network. Although encryption is common, a VPN connection does not require it. A VPN is created by creating a virtual point to point connection over existing networks utilising dedicated circuits or tunnelling technology. Some of the advantages of a wide area network can be acquired by connecting to a VPN over the public Internet (WAN). From the user's perspective, the resources supplied within the private network can be accessed remotely.

The following are the various types of VPNs:

• Site to Site VPN: A Site to Site VPN, also known as a Router to Router VPN, joins the networks of two offices in different locations. There are two subcategories, as indicated below:
  • Intranet VPN: Intranet VPNs are used for connecting remote offices in various locations utilising one single infrastructure, that is, the servers, internet connectivity, etc., as a private WAN and the same accessibility POLICIES (wide area network).
  • Extranet VPN: Extranet VPN uses common infrastructure to connect intranet users, suppliers, consumers, partners, and other entities via dedicated connections.
• Access VPN: An access VPN is a sort of virtual private network that allows mobile users and telecommuters to connect to the internet from a remote location. Dial-up or ISDN (Integrated SERVICES Digital Network) connections can be REPLACED with it. It's a budget-friendly alternative with a variety of connectivity possibilities.

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