What is a secure virtual network called that uses the public network?

A secure virtual network that utilizes a public network is known as a VPN, or Virtual Private Network. A VPN establishes an encrypted connection over the internet, allowing users to send and receive data securely as if their devices were directly connected to a private network. This is particularly essential in maintaining confidentiality and integrity when accessing resources remotely or transmitting sensitive information over potentially insecure public networks.

The security features of a VPN include encryption of data packets, which protects against eavesdropping and man-in-the-middle attacks. Additionally, VPNs often authenticate users and devices, ensuring that only authorized users can access the network. This makes them a popular choice for remote work and secure communications.

In contrast, LAN (Local Area Network) and WAN (Wide Area Network) refer to types of network setups that do not inherently provide the same level of security over public means. An Intranet is a private network used within an organization that typically does not utilize the public internet for its operation, thereby lacking the characteristics that define a secure virtual network over public infrastructure.