CyberCertPrepOT Security FundamentalsOT Fundamentals: Network Architecture & ProtocolsEASYFree question
Within Purdue terms, 'north-south' traffic in a plant network generally refers to:
- A.Broadcast ARP requests on a single VLAN
- B.Traffic between two PLCs on the same control segment
- C.Multicast GOOSE traffic within a substation bay
- D.Traffic crossing between different levels or zones, such as control-to-enterprise through the DMZ
Why D is correct
North-south traffic moves vertically across zone/level boundaries (for example, control network up to the DMZ and enterprise). East-west traffic moves laterally between peers within the same zone, such as two PLCs on one segment.
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