350-401 Practice Question: Drag and drop each IP SLA threshold type on the…

• A.It triggers an event once and then stops monitoring.
• ✓ B.It triggers an event each time the RTT exceeds 200 ms and resets the counter after each trigger.
• C.It triggers an event only if the RTT exceeds 200 ms for 5 consecutive probes.
• D.It triggers an event and then immediately stops the IP SLA operation.

Why B: The 'action-type triggerAndReset' parameter in the IP SLA reaction configuration causes the router to generate an event (e.g., a syslog message or SNMP trap) each time the measured round-trip time (RTT) exceeds the specified threshold of 200 ms. After each trigger, the monitoring state is reset, allowing the router to continue monitoring and trigger again on subsequent threshold violations. This is why option B is correct.

• ✓ A.The IP SLA operation will send ICMP echo requests every 15 seconds and trigger an event if a timeout occurs, but the trigger will only activate once.
• B.The IP SLA operation will send ICMP echo requests every 15 seconds and continuously trigger events for each timeout.
• C.The IP SLA operation will send ICMP echo requests every 15 seconds and trigger an event if the round-trip time exceeds a threshold.
• D.The IP SLA operation will send ICMP echo requests every 15 seconds, but the 'reaction-configuration' command is invalid because it requires a threshold value.

Why A: The IP SLA operation sends ICMP echo requests every 15 seconds (as defined by the 'frequency 15' command) and the 'reaction-configuration' with 'threshold-type immediate' and 'action-type triggerOnly' means that as soon as a timeout occurs, a trigger event is generated, but the 'triggerOnly' keyword ensures that the trigger fires only once (not repeatedly) for the first timeout event. The operation continues to run, but no further triggers are generated for subsequent timeouts unless the reaction is rearmed.

• A.It triggers an event if 5 out of the last 10 RTT measurements exceed 100 ms.
• ✓ B.It triggers an event if 5 consecutive RTT measurements exceed 100 ms.
• C.It triggers an event if the RTT exceeds 100 ms for 5 seconds.
• D.It triggers an event if the RTT exceeds 100 ms and then repeats 5 times.

Why B: The 'threshold-type xof 5' parameter in IP SLA triggers an action when 5 consecutive RTT measurements exceed the specified threshold of 100 ms. This is a 'consecutive violations' threshold, meaning the event fires only after a sustained pattern of failures, not based on a sliding window or time duration. The 'xof' keyword specifically indicates the number of consecutive probe results that must exceed the threshold before the reaction is triggered.

• ✓ A.It triggers an event immediately when a timeout occurs.
• B.It triggers an event after a delay of 10 seconds.
• C.It triggers an event only if the timeout persists for 5 consecutive probes.
• D.It triggers an event only if the timeout occurs within the first 10 seconds.

Why A: The 'threshold-type immediate' parameter in an IP SLA reaction configuration causes the router to trigger the specified action (in this case, 'triggerOnly') as soon as a single probe timeout occurs, without waiting for any additional probes or a delay. This is correct because the configuration explicitly sets the threshold type to immediate, meaning the reaction is instantaneous upon detecting the timeout event.