Viper SC+™ IP Router for Licensed Spectrum PN 001-5008-000 Rev. C | Page 122.1.1. POINT-TO-POINT NETWORKA point-to-point network is the simplest type of network, and may be used for connecting a pair of PCs, a hostcomputer and a terminal, a SCADA polling master and one remote, or a wide variety of other networking applications.Figure 4 – Point-to-Point Network2.1.2. POINT-TO-MULTIPOINT NETWORKA Point-to-Multipoint network is a common network type used in SCADA and other polling systems. The Master Pollingstation communicates with any number of remotes and controls the network by issuing polls and waiting for remoteresponses. Individual PLC/RTU remotes manage addressing and respond when their individual addresses are queried.PLC/RTU unit addresses are maintained in a scanning list stored in the host program or master terminal device at theSCADA host site. Communications equipment is transparent and does not interact with specific remotes; all data iscoupled to the host on a single data line (such a network is commonly used with synchronous radio modems andasynchronous radio modems).Figure 5 – Point-to-Multipoint Network
