Which two options are IACS applications with prioritized traffic? (Choose two.)

Question

Options

• AHuman Machine Interface
• BService Set Identifier
• CInput / Output
• DThroughput
• EResiliency Ethernet Protocol

• A
  93% (25)
• B
  4% (1)
• D
  4% (1)

Explanation

In Industrial Automation and Control Systems (IACS), Human Machine Interface (HMI) and Input/Output (I/O) are the two applications that require prioritized network traffic because they are time-critical: HMIs display real-time process data to operators who must respond quickly, while I/O traffic carries sensor/actuator data between controllers and field devices where latency directly affects control loop performance and safety.

The distractors fail because SSID (B) is simply a wireless network name identifier - a configuration parameter, not an application; Throughput (D) is a network performance metric, not an application at all; and REP (E) (Resiliency Ethernet Protocol) is a Cisco ring-topology redundancy protocol - it supports network availability but is not itself an IACS application requiring traffic prioritization.

Memory tip: Think "factory floor in action" - an operator watching a screen (HMI) and a sensor talking to a PLC (I/O) are the two things that cannot wait. Everything else in the list is either a label (SSID), a measurement (Throughput), or a plumbing protocol (REP).

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