Exam 400-007 topic 1 question 99 discussion

I think it's D

It should be B https://en.wikipedia.org/wiki/NetFlow#NetFlow_and_IPFIX NetFlow collection from dedicated probes is well suited for observation of critical links, whereas NetFlow on routers provides a Network-wide view of the traffic that can be used for capacity planning, accounting, performance monitoring, and security.

one of prominent use case is "Network Performance Optimization" that includes BW Utilization, QoS, Capacity Planning

IPFIX has broad use cases which can be categorized into 3 main classes: flow analysis, threat detection and performance monitoring. As IPFIX-enabled devices are mainly deployed at significant positions in the network, it enables broad-based monitoring of hosts and network infrastructure devices with the resulting flow record data presenting an extensive set of connection summaries.

IPFIX flow records typically provide various performance statistics associated with IP traffic, such as RTT (Round Trip Time), Delay, Jitter and others. Probes at critical points in the network deliver performance metrics as a part of IPFIX message export to IPFIX collectors which are able to store and report on these statistics. Response time metrics for critical application and monitoring of round trip time between specific servers and network systems (e.g. server response time over HTTP/HTTPS, latency for server to storage access) can be gained as indicators for network performance. Beyond validating network performance, export of IPFIX flow records to IPFIX collectors also helps in enhancing visibility into network utilization and network capacity planning.

Seems good https://www.google.com/amp/s/blog.niagaranetworks.com/blog/ipfix-use-cases-in-network-monitoring-and-analysis%3fhs_amp=true

I believe it is D. IPFIX has wide-ranging use cases which together can be classified in 3 main categories: flow analysis, threat detection and performance monitoring. As IPFIX-enabled devices are typically deployed at key locations enabling broad-based monitoring of servers and network infrastructure devices, the resultant flow record data provides a comprehensive set of connection summaries. https://blog.niagaranetworks.com/blog/ipfix-use-cases-in-network-monitoring-and-analysis

D is a more accurate answer here; NetFlow (IPFIX is based on NetFlow v9) allows granular and precise traffic measurements.

Probes at critical points in the network deliver performance metrics as a part of IPFIX message export to IPFIX collectors which are able to store and report on these statistics. https://blog.niagaranetworks.com/blog/ipfix-use-cases-in-network-monitoring-and-analysis

Some of the questions have multiple correct answers; however, identifying the most accurate answer is difficult and also questionable. A & D are equally good, as per the link/info. https://www.cisco.com/c/dam/en/us/td/docs/solutions/CVD/Aug2014/CVD-ApplicationMonitoringUsingNetFlowDesignGuide-AUG14.pdf IPFIX metadata provides information about IP traffic flows that gives network administrators with extremely beneficial operational insight into data center network performance, security and other applications https://blog.niagaranetworks.com/blog/ipfix-use-cases-in-network-monitoring-and-analysis

It should be B