350-401 Question #966: Real Exam Question with Answer & Explanation

Question

Router R1 must be configured as a UDP responder on port 6336. Which configuration accomplishes this task?

Options

• A(config)#ip sla responder udp-echo ipaddress 10.10.10.1 port 6336
• B(config)#ip sla responder udp-echo ipv4 10.10.10.1 port 6336
• C(config)#ip sla responder ipaddress 10.10.10.1 port 6336
• D(config-if)#ip sla responder udp-port ipaddress 10.10.10.1 port 6336

Explanation

IP SLA UDP Responder Configuration

Option A is correct because the proper Cisco IOS syntax for configuring an IP SLA UDP echo responder is ip sla responder udp-echo ipaddress [IP] port [port-number], entered from global configuration mode - this exact syntax tells the router to listen and respond to incoming UDP SLA probes on the specified IP and port.

Option B is incorrect because ipv4 is not valid syntax in this command; the correct keyword is ipaddress. Option C is wrong because it omits the required udp-echo keyword, which specifies the protocol type for the responder. Option D is invalid for two reasons: it uses the wrong mode (config-if instead of config) and uses the non-existent keyword udp-port instead of udp-echo.

Memory Tip: Think of the command structure as a sentence - "SLA responder, UDP echo, at this IP address, on this port" - which maps directly to: ip sla responder udp-echo ipaddress X.X.X.X port XXXX. Always remember this is a global config command, not an interface command.

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