
Chapter 2
2.7 Network trust relationships
Business networks frequently require connections to other business
networks. Such connections can occur over leased lines, proprietary
wide area networks (WANs), value-added networks (VANs), or public
networks such as the Internet. For instance, many local governments
use leased lines or dedicated circuits to connect regional offices across
the state. Many businesses use commercial VANs to connect business
units across the country or the world.
The various network segments involved may be under control of dif-
ferent organizations and may operate under various security policies.
By their very nature, when networks ...