What is Virtual Private Network VPN?
Virtual Private Network VPN Definition: A protected information system link utilizing tunneling encryption and authentication to achieve confidentiality of content.
Understanding Virtual Private Network VPN
A Virtual Private Network VPN is a secure connection that uses tunneling encryption and authentication protocols to protect data as it travels over public networks like the internet. By creating an encrypted "tunnel" between two endpoints, a VPN ensures that sensitive communications remain confidential and unaltered, even when transmitted across untrusted environments. This technology is commonly used to grant remote users access to corporate networks, establish secure site-to-site links between offices, and enhance privacy when browsing on open networks.
Standards such as those outlined in IETF RFCs for IPsec and TLS form the backbone of VPN technology, providing the necessary framework for robust encryption and user verification. Organizations deploy VPN solutions using various methods—including dedicated hardware appliances, software clients, cloud-based services, and integration with identity management systems—to tailor security measures to their specific needs. For instance, a multinational company might adopt an always-on VPN for corporate devices, implement split-tunneling to optimize performance, incorporate multi-factor authentication for heightened security, and enforce granular access controls that limit network resources based on user roles.
Related terms include Remote Access, Secure Tunnel, IPsec, SSL VPN, TLS, Encryption, Authentication, Split Tunneling, Site-to-Site VPN, and Remote Work Security.