Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) v1.2InfrastructureHard
A network engineer is troubleshooting a recently deployed application that uses UDP for real-time communication. Users report intermittent connectivity and performance issues, but a basic ping to the server is successful. The firewall team confirms no explicit blocks. Which IP Services feature could help diagnose if the UDP traffic is successfully reaching the server's application port and if the response path is functional?
- ASNMP polling
- BIP SLA UDP Jitter operation
- CSyslog messages
- DNetFlow
Show answer & explanationAnswer & explanation
Correct answer: B. IP SLA UDP Jitter operation
IP SLA UDP Jitter operations specifically send UDP packets to a destination port and measure one-way and two-way delay, jitter, and packet loss. This directly tests the application-level connectivity and performance for UDP traffic, which is ideal for diagnosing real-time communication issues where a simple ping (ICMP) is insufficient.
Why the other options are wrong
- A. SNMP polls device statistics (CPU, interface counters), not end-to-end application path health or UDP performance.
- C. Syslog provides event messages, which might indicate issues but don't actively test real-time UDP application performance.
- D. NetFlow provides statistics on traffic flows, but doesn't actively test end-to-end application connectivity or report jitter/loss.
IP SLA UDP Jitter Operation
A Cisco IP Service Level Agreements (IP SLA) operation that measures performance metrics for UDP traffic, including jitter, latency, and packet loss.
- Sends UDP packets to a specified destination IP address and port.
- Useful for diagnosing real-time application performance issues (e.g., VoIP, video).
- Provides metrics like one-way/two-way delay, jitter, and packet loss.
Memory trick: UDP App Trouble? IP SLA Jitter Will Show the Route.