Which IP SLA operation requires an IP SLA responder on the remote endpoint?
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Correct answer: UDP jitter.
Why this is the answer
UDP jitter operations require an IP SLA responder on the remote endpoint to provide accurate one-way delay, jitter, and packet loss measurements. The responder timestamps incoming UDP packets and sends them back to the source, allowing for precise calculations. ICMP jitter, TCP connect, and ICMP echo operations do not require a dedicated IP SLA responder. ICMP jitter uses standard ICMP messages, TCP connect tests TCP handshake completion, and ICMP echo is a basic ping, none of which need a specialized responder application to function.
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