A SCADA system has multiple remote terminal units (RTUs) connected to a central master station. Each RTU communicates directly with the master station, but not with each other. What type of communication network topology is this?
Think about a central point connecting all devices directly.
In star topology, all nodes connect to a central hub or master station. RTUs connect directly to the master, matching this pattern.
In a SCADA ring topology network, a diagnostic command is run to check the path of communication. The command output shows the sequence of nodes visited: RTU1 -> RTU2 -> RTU3 -> RTU4 -> RTU1. What does this output indicate?
ping -r RTU1 RTU4
Look for repeated nodes indicating a loop.
The output shows the message traveling through all RTUs and returning to the start, confirming a ring topology with a closed loop.
You want to configure a redundant communication link between two RTUs in a mesh topology to improve fault tolerance. Which configuration snippet correctly adds a secondary link between RTU2 and RTU3?
In mesh, links are bidirectional and redundancy means multiple links between nodes.
Option B correctly adds two links in both directions between RTU2 and RTU3, creating redundancy in the mesh network.
In a SCADA bus topology, communication between the master station and RTU4 suddenly stops. Other RTUs communicate fine. What is the most likely cause?
In bus topology, a break in the cable affects downstream devices.
A break in the bus cable between RTU3 and RTU4 would isolate RTU4 but not affect others upstream, matching the symptom.
Arrange the steps in the correct order to deploy a star topology SCADA communication network.
Think about hardware setup before configuration and testing.
First install hardware (master), then configure protocols, next connect RTUs, finally test links.