Protected information system link utilizing tunneling, security controls, and endpoint address translation giving the impression of a dedicated line.
Sources:
NIST SP 1800-21B
under Virtual Private Network
from
CNSSI 4009-2015
NIST SP 800-53 Rev. 5
under virtual private network
from
CNSSI 4009-2015
A virtual network built on top of existing networks that can provide a secure communications mechanism for data and IP information transmitted between networks.
Sources:
NIST SP 800-113
under Virtual Private Network
A restricted-use, logical (i.e., artificial or simulated) computer network that is constructed from the system resources of a relatively public, physical (i.e., real) network (such as the Internet), often by using encryption (located at hosts or gateways), and often by tunneling links of the virtual network across the real network.
Sources:
NIST SP 800-82r3
under virtual private network
from
RFC 4949 - adapted