gtps2m0g | ACF/SNA Data Communications Reference |
A multiple-domain network is a cohesive, coordinated network composed of 2 or more interconnected domains. Networking is a term used to describe communications among different domains. Single-domain networks can support many concurrent applications via shared resources. Although 2 or more single-domain networks can coexist, even using the same CPU and communications controller, the networks are independent of each other. They lack the ability to communicate with each other. Communication between domains is only possible in multiple-domain networks. This type of communication is referred to as cross-domain communication. TPF supports communication with other domains. These include:
Before domains can communicate, a path must be established between the cross-domain resource managers (CDRMs). A path consists of a single NCP attached to 2 hosts, or multiple NCPs each attached to a host or another NCP where the NCPs are connected via SDLC lines. A path can also consist of an SNA CTC connection.