350-401 Question #47: Real Exam Question with Answer & Explanation

Question

Which IP SLA operation requires the IP SLA responder to be configured on the remote end?

Options

• AICMP echo
• BUDP jitter
• CCMP jitter
• DTCP connect

Explanation

IP SLA Responder Explanation

UDP Jitter (Option B) requires the IP SLA responder to be configured on the remote device because it measures advanced metrics like jitter, latency, and packet loss in both directions - the responder must actively timestamp and process packets to provide accurate two-way measurements that a standard device would not perform by default.

Why the distractors are wrong:

• Option A (ICMP Echo): Uses standard ping functionality built into all IP devices; no special responder configuration is needed since every device responds to ICMP by default.
• Option C (CMP Jitter): This is not a valid Cisco IP SLA operation type - it's a fabricated distractor designed to confuse candidates.
• Option D (TCP Connect): Only requires an open TCP port on the destination device; it tests connectivity at the transport layer without needing a dedicated IP SLA responder.

💡 Memory Tip: Think "Jitter needs a Judge" - UDP Jitter measurements require a dedicated responder (the "judge") on the remote end to accurately score the precise timing metrics in both directions. If the operation can use standard OS-level responses (ICMP, TCP), no responder is needed.

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