virtual route (VR)

1. A path between a data source and a data sink that may be created by various circuit configurations during the transmission of packets or messages.; 在傳輸信息包或報文時，可由各種電路配置產生的在數據源和數據宿之間的一種通路。 2. In SNA, a logical connection: (a) between two subarea nodes that is physically realized as a particular explicit route, or (b) that is contained wholly within a subarea no de for intranode sessions. A virtual route between distinct subarea nodes imposes a transmission priority on the underlying explicit route, provides flow control through virtual route pacing, and provides data integrity through sequence numbering of path information units (PIUs). | 在系統網絡體系結構(SNA)中，分別在下列兩種情況下的邏輯連接：(1) 在物理上作為特定的 顯示路由實現的兩個子區網點之間，或(2)完全包含在用于內部網點對話的子區網點中。在不同的 子區網點之間的虛擬路由，把傳輸優先級加給有關的顯式路由，通過虛擬路由調步提供流控制， 且通過通路信息單元(PIU)的順序號提供數據的完整性。參閱explicit route (ER), path, route extension (REX)。