Explain the different types of VPN.

There are two types of VPNs:

Remote Access Virtual Private Network:
A Remote Access VPN securely connects a device (endpoints like laptops, tablets, or smartphones) outside the corporate office. It allows a client to associate with a private network and access every one of its resources and services remotely. The private network and the user connect securely through the Internet. It is a low-cost solution and is helpful for both business and home users.

Site-to-Site or Router-to-Router Virtual Private Network:
This VPN is mostly used in large organizations with branches in different locations to connect the network of one office to another in different locations. It has two sub-categories:

Intranet VPN: Intranet VPN allows several offices of the same company to connect using the Site-to-Site VPN type. It is commonly used for connecting remote offices in different geographical locations using shared infrastructure (internet connectivity and servers) with the same accessibility policies as a private WAN (wide area network).
Extranet VPN: Extranet VPN allows companies to use Site-to-site VPN type to connect to another company’s office. It uses shared infrastructure over an intranet, suppliers, customers, partners, etc., and connects them using dedicated connections.